Plugging two 4K monitors into my laptop (which has a native 1080p display) is an awful experience when booted into Ubuntu. You either have to set the DPI to make the laptop display unusable or set it to make the 4K monitors look like $hit.
Plus... you know... games.
Multi-DPI is kind of a hack in general though and is likely to cause issues unless applications have been tested for it very thoroughly, it causes serious issues on major frameworks like Electron and Qt - though both of their support for it is improving slowly. If you want things to work smoothly for now, try to stick to 1 DPI setting.
It's not windows fault the apps don't take advantage of DPI.
You can also disable dpi scaling for individual apps.
It's "not Windows fault", sure but it certainly makes it a worse experience than other platforms like OSX where multi-DPI is much more commonly supported.
I mean, I get it, same issue as Vista for Microsoft - people expect 100% backwards compatibility, but it turns out that terrible design decisions made many years ago tend to mean you need to break compatibility. Just like UAC, resolution scaling will be an issue that becomes less painful in Windows over time. Right now it's not great, however.
Just most apps chose to ignore it, the developers took the 'anyone uses 96 dpi anyway' attitude and at the end of 90's most applications started to suck at 120 dpi.
I guess people got lazy, as you say.
No point in spending time on logical pixels if it makes almost no relevant difference...
If you're making a decision about whether to make a purchase, don't make it unless you're prepared to do it all at once. Stick to ~100 DPI until you can make a commitment to go all at once.
That has not been my experience here at all. There is a rather active, and sometimes vocal, Windows fan base around here. Misconceptions about the current state of desktop Linux are commonly seen as it seems most people around here only use either Mac or Windows.
I mostly use mac at work, mostly windows at home, and a bit of linux for servers, and my htpc (most of my casual browsing at home)... Each experience is fairly different. And they all have pluses and minuses. That said, more often than not, I prefer the Windows UI desktop/menu, but osx & unity app integration and linux/bash shell environment. I wish that Ubuntu/unity would integrate more of the menu/taskbar features found in windows. (And bring back natural scrolling checkbox)