Earlier quoted context omitted.
I think 27" 4k with some scaling is a good spot indeed. 32" 4k is nice as well, if you scale down to 2560x1440, or 3008x1692. On 32" 2x scaling (1920x1080 is just too big, and native (3840x2160) is just too small. But if money is no problem, 3x 24" 4k, 2x 27" 5k, or 1x 32" 6k is really the endgame. That 2x scaling is just soooo crisp. :)
The PPI ratio for 32" 4k with no scaling is actually pretty good (at least to my eye, since it's similar to my previous 24" 1080p, 27" 1440p monitors). If we can agree on that, then the solution is to just move the monitor closer to your eyes, 3rd party monitor arms help with that.
Significant difference. 32" 4k is not pleasant to read natively, and bringing it that close that is would be readable means you are putting things out of your focus and you need to start moving your head a lot.