I think integer scaling is overrated. I believe there might be difference in sharpness introduced by non-integer scaling, but most people won't notice it (provided with same screen DPI).
I'm not a car person so fair warning if the analogy does not land, but:
Integer scaling is like spoilers on cars - important for a select few, and wholly unnecessary for most others (but they might still like the look).
The trouble is that you have many types of people discussing the topic, so it can be hard to distinguish A) who actually benefits from integer scaling in their work, B) who's interested in it because they can see the visual distinction and like the results it gives better (but it doesn't matter for how they do their job), C) who's looking at the discussion and going
"oh man, sounds like it's a big deal so I guess I also need to care about it" and D) who doesn't need it and / or see it and / or has other priorities, and thus thinks everybody else is overreacting.
So it's fine that you think it's overrated, you're right to believe that there might be a difference in sharpness (there is), and
I also believe you're right in that most people won't notice it.
According to my experience with external monitors (24" 1080p, 25" 1440p, 27" 1440p, 27" 4k, and two macbooks 13" 1600p and 15" 1800p), hi-DPI with scaling - integer or not - is way better than low-DPI without scaling.
I'd caveat this claim with
usually, but yes I can also see where this would be true.
But People usually sit a bit further in front of 27" 4k screen, so the difference between a 27" 4k with 1.5x scaling a 200+dpi macbook with 2x scaling is even smaller to notice.
I believe so too, although I'm an exception myself.
So I strongly disagree with article's claim (
https://dev.to/iq9/external-monitor-for-macos-avoiding-the-blurry-text-issues-5o1) that 27" 4k is bad but 32" 4k is good.
The discussion I linked to resonated with my personal experiences so it was easy for me to agree with, but I can see how under a different set of circumstance the findings might not be as convincing or useful.
The topic is timely for me because I'm trying to figure out a display solution for my personal Mac upgrade. Integer scaling is one of the things I need to consider because I know from experience that I
do benefit from it in my work, but at the same time I don't
necessarily need it if I choose not to use the display for work (either way it's coming out of my own pocket). But when you work at the same desk where you also do your personal computing,
it would make a lot of sense to buy a display that can serve both needs.
For my personal needs, a 30" display with 2560x1600 resolution at 100 DPI would be perfectly fine, for example. I'm currently using a 27" 2010 iMac (108 DPI) so I'd feel right at home - except that I've read and been told that modern macOSes don't render fonts at non-retina resolutions as well as, say, High Sierra does. So that's potentially a problem I need to consider. Unfortunately I can't currently verify how big of a problem it would be for
me.
If I
also want to use the same display for work, then there's a really strong case for getting the Studio Display... except that it doesn't appear to be designed for connecting to two computers simultaneously, and easily switching between them (I'm not interested in external boxes that would allow this * ).
I'm sure the answer will come in time, it's just that right now there's no obvious solution.
* Edit:
I'll clarify my comment about not being interested in external Thunderbolt boxes: I'd
rather do without one, but just like every other thing I'm having to consider it's going to be a case of what benefits do I want, and what downsides (such as added connectivity complexity) I'm willing to accept to get those benefits.