Even gaming channels like LTT talk about this a bit.
The major benefit of high-DPI displays isn't for gaming or graphics, it's for text. Once you're used to decent resolution and scaling, reading on anything else looks like a blurry mess.
I think this is the key. I've never used very good or very high-res screens for a sustained period of time, so I haven't gotten used to it. Personally I'm not too keen on jumping on them. My 1366x768 15.6" screen renders text just fine for me.
The major benefit of high-DPI displays isn't for gaming or graphics, it's for text. Once you're used to decent resolution and scaling, reading on anything else looks like a blurry mess.