Cyanocrylate adhesives were accidently discovered in WW2 while trying to develop a clear plastic. Later Eastman-Kodak held the patent and then sold it to Loctite on the 1960s.
Loctite 404 is so much better than anything else available on the market. It bonds better, it's stronger, it lasts longer and the bottle applicator is more controlled and easier to use. If you want it to last years, you can actually store in in the refrigerator when not being used.
SD cards, SSD, USB drives, any form of computer memory really and replacement batteries too eg for cameras.
I suck up the cost and buy directly from a reputable manufacturer.
Huy Fong Sriracha. As the shortage has made painfully clear. When I dream at night, I'm eating food covered in sriracha and tinkering with my roomful of Raspberry Pi projects.
And don't talk to me about disgruntled pepper farmer rivalries or whatever bullshit. Just please give me back my sriracha. :(
Pretty much every signature soda drink. Pepsi, Coke, Mountain Dew... none of the knock-offs taste right and some are just nasty. Oddly, root beer seems to be the one flavor everyone can do well, maybe because it's a more common flavor with no patents on the general idea? I dunno but I don't think I've ever had a 'bad' root beer.
I honestly can't think of anything. I own many "name brand" products but it's usually a pay-once-cry-once situation. It's not like I keep buying more of the same product after I already have one.
For consumables pretty much every product I use is the generic version of some well known one. I'm not paying double the price for something that's 20% better. For example the generic version of my favourite cookies is 95 cents and the name brand is 3.4€. It's not that much better.
My dad always bought the no-name cookies for us, according to him every major brand had a deal with discount supermarkets to sell their brand name product under a cheaper no-name alias.
That might be true in some cases but the stuff he bought was mostly just cheap knock-offs that didn't even come close to the original.
Coffee. I found a coffee shop I loved 20 years ago and have been buying beans from them ever since. Sure, it's 2x-3x times more expensive, but it's worth it to me.
Toothpaste. I have sensitive teeth and the off brands just don't cut it. Heck, some of the name brands don't.
3d printing filament. Printed Solid named their line after their dog, so I have to. I will still branch out for stuff on sale, but the majority of my stock is Printed Solid.
Most foods. Store brands are (nearly) always lacking in something. Be it tiny sized canned beans, or jam whose only flavour is ‘sweet’. That shit is cheap for a reason.
Doesn’t apply to everything (depending on where you live), some things you can’t cut corners on without advertising it. 2% Milk is 2% milk.
But largely, low cost food has been made low cost via haircuts and shortcuts.
Bahlsen Schoko-leibniz. The store brand ones don't have nearly as nice chocolate.
Conversely, after eights are garbage and the supermarket version comes with nicely tempered chocolate that does a very satisfying crackle when you bite.
Milk. Great Value’s brand just tastes so darned awful for some reason I can’t place. I live in the midwest, and Prairie Farms is pretty common as a brand here.
There are some others, many dairy products now that I think about it, but there’s also some medicines like Mucinex which I prefer to use over generic brands. I’m otherwise not very picky.
This has become a rarity for me but I don't like any french onion dip other than Dean's French onion dip.
I don't eat it very often because my tastes have changed but if I had to go to the store and buy some right now if they didn't have deans I wouldn't get it.
I've tried a lot of generic ibuprofen meds (E: including gel ones) but nothing acts both as fast and effectively as advil gel pills. It very well may be a placebo, but I don't really care so long as it works.
Shave gel. Some soaps. Some said Old Baby Bay seasoning and I am 100% behind them on that. Toilet paper. Menstrual pads. Ritz crackers (the consistency, the flavour, the texture/mouth feel). Certain electronics. Definitely tools (I've broken so many pairs of diagonal side cutters and the ones that have held up the best and had the best warranty are knipex). And yeah. I buy Advil (the candy coating makes it easier for me to swallow dry and I'm pretty prone to need it for lots of pains because I'm basically a walking talking broken vessel).
All the generics are awful in taste or consistency (for instance not being as finely ground it seems). And weirdly in Kirkland Signature's case, foamy.
Stupid expensive for what it is. But the effect is worth it.
VH soy sauce over store brand. Has to be. VH is king, store brand is so bad it doesn't even count as soy sauce, and I'm a broke dude who buys store brand everything possible. Also mini-wheats, store brand mini wheats are terrible. Other store brand cereals are good but with mini-wheats they dropped the ball.
Hair and skincare, especially since it's not even more expensive if I buy from a local store that sells those products in bulk.
I usually actually prefer the local knockoffs, it's usually better and uses locally sourced ingredients. Like soft drinks from the US taste sickeningly sweet and I really don't like them but there are plenty of locally made soft drinks that are great.