I have a 34" IPS ultrawide from 2018 that I’ve been using heavily for work and personal use (essentially 14+ hours a day). Since it’s an IPS panel I have no worry about burn-in. And I can keep using it for another 6-7 years without worrying about it.
With an OLED panel in the same scenario, I’d expect to see some burn in happening within 3 years of getting it.