Conclusion after reading tens of comments here: no way to know if I'm young enough for 27" 4k (which is finally affordable in my country) or if I should go with 2560x1440 at 24", which feels outdated in 2020...

And that isn't a great step over my working 22" 10-year old 22" FHD Dell.

How long until we have affordable 'Macbook like' crispness as 22" or 27"?

(Also Linux still sucks with fractional scaling.)