The best thing about OLED is not having disgusting amounts of blooming[0] and purple-pink edge fraying.
It's so bad that the first time I used my M series I thought I needed to RMA it because the display must be broken it it looks this bad, right? Nope.
I had the same experience but to be fair, you only notice this in complete dark rooms. Which is a fringe scenario.
In practice you will hardly ever notice this. Especially not during normal use. Maybe only during videos.
Thats a side effect of the 1000+ dimming zones no? I snagged this ASUS ProArt display that was Professional Grade on eBay and among its many flaws is that its 1000+ dimming zones result in blooming whenever you have bright items on top of a complete black background. Makes it terrible for horror movies. :/