People really ignore so much about the Studio Display.
Yes it's old, but when it came out there weren't 5K screen at all to buy new. Yes it does not have 120Hz because Thunderbolt couldn't push that much bandwidth when it came out.
Yes it's not OLED because OLED was not mass produced at that time. And why does everyone want OLED? Yes it's good but a good standalone monitor should at least hold for 5+ years. I personally don't give a crap about OLED, don't want to have to throw it away after 1 or 2 years.
Only recently with Thunderbolt 5 it would be possible to have 5K with 120Hz. I just hope it'll be MiniLED and not OLED.