In this case the person you were responding to was right. It is where they put their news and weather widget. Which only exists to push people onto Bing. It is annoying, and by default pops up on rollover, not click, so it is trivially easy to accidentally pull up, pumping those Bing engagement numbers.
Also, a start menu that opens in the centre is technically the best. It's in the most prominent part of the screen, and your mouse typically isn't far from there.
The start button is harder to hit than simply flinging it into the corner though, definitely.
If you're the kind of person who opens the start menu with the Windows key, a centre start menu is only an upgrade IMO.
In which case, the question becomes: what percentage of users are actually using ultrawides? If it isn't >50%, then the default should be the setting most appropriate to non-ultrawides. Unless you're going to autodetect screen resolution and set the button's location appropriately.
This is not rocket science, but Windows has been blowing it for quite some time now.
Never thought about ultrawide screens, that makes sense. Other than that I see no improvement whatsoever. Corner space is way easier to hit with a mouse, but even when using keyboard shortcuts having it in the middle is just an additional adjustment from what it used to be.
An OS should get out of my way and let me do what I do. Changing design language forces me to relearn what I had already had a flow for. In other words it's utterly useless.
And I just know I'm gonna hate that automatic categorisation of apps, just as I hate web searches from start menu. Alphabetical order is predictable, but this I'd have to relearn.
It's an easier click target when it's in the corner. Moving cursor from the middle to the corner is negligible for me since I can reach the whole screen with relatively minor mouse movement.
In the end it's a muscle memory thing for me. Having the button in the middle just means I have to look for it in a different location than I've used to over the years.
I actually use it like that. I dont really see the reason pepole hate it so much. Geniuenly a better place for it (mind you im only talking about placement. The design itself is something else ). Since generaly if you use start menu you focus on it to launch something so it might as well be in tge middle of your screen.