My current computer is a Dell Latitude wide laptop, with an I5 and a fairly huge hard drive. I use a 22" monitor and a Logitech mouse. It does have a full-size keyboard. The only thing I don't like about it is the damned touchpad.
This monitor size is perfect for my vision: Any bigger and it would be hard to watch TV on it at my optimal viewing distance. I rarely even use the full screen for video.
I've been building my own computers for about 44 years. Dozens of them. I don't really enjoy it much anymore. Last time my wife's computer went South, I bought her a Windows 10 computer the size of a cigarette pack and left it all up to the maker. I tend to wait until they poop out before updating. I'd probably get one similar to hers when I do.