A 4K Display is fine, good in fact!
This article from Matt Birchler brought up a point I meant to relay when I bought a 4k monitor for my Mac Mini. I kept hearing the usual pundits say that the only real solution for the Mac was something “Retina” i.e. a 27" 5K Display. Looking at the prices of those I couldn’t justify spending more than my Mac Mini for a monitor. So I went with a Dell S2725qs and guess what? Its good! Is the 5k clearer? Probably but I have not seen one in person. Would it be double the cost clearer? Hell no.
As I move back into the Mac ecosystem after years away, I have been content to buy Apple’s lower end products despite the FOMO that you’ll hear from a very vocal subset of the Apple community. In each case so far I have been content with my choices, in fact when I purchase an iPad later this year its going to be the base model, it will suite might needs without fail.