I have been using a single 28" 4K screen for a while and I've never felt like I needed more pixels since. At 100% scaling there's a ton of space. No need to go through the minimize, maximize, switch, switch back usage pattern.
I've never understood why people are willing to put up with garbage gear either. I'm not talking about the computer itself, but the things you touch.
You sit at this machine and use it for 8h+ a day. Why shouldn't you be in contact with things that feel good to you?
Nice screen (or two if that is your preference), decent keyboard, mouse that feels good. I think it is important.
Mechanics don't use dollar store ratchets, do they?