Aside from the dangers of burn-in, what ELSE is the problem with OLED for a general-purpose home display?
Cost (OLED is more expensive).
And the colors of OLED certainly pop, but in terms of graphic design where color accuracy is important, professionals still might prefer an IPS monitor with better color calibration.
Also, they've made huge strides in burn-in, but it's still a danger and some people don't want to deal with the stress of accidentally ruining a $1000 monitor.