Game Boy lasted over 9 years between 1989 and late 1998, then Game boy Color happened.
Some people consider GBC just another GB revision, but with twice the processing power and memory, on top of the colour screen, it does not really make sense IMO.
Well, they still support the Switch really good with tons of games still coming out - first, second and third party.
Also a lot of the "cool" indie games getting a switch port makes it the perfect machine for people like me who love that kind of stuff but are not into pc's. Dredge and Dave the Diver come to mind. Love, love! both of them!
I really can't get used on the controller. Every time I play my son switch, I can play only a short period of time. The steam deck looks better in that regard.
You can get controller adapters to plug other controllers into the switch, you only need homebrew if you want to do it without anything extra.
I forget who makes them. It might be 8bitdo? There are probably a million clones by now though because this was something I remember seeing earlier on in the switch's lifecycle.