I'm confused though. Isn't mini LED superior to OLED except for the blooming issue? Better HDR experience on mini-LED vs OLED.
Mini LED is indeed superior. If Apple thought OLED was best, they would have put it in MacBook Pro. There are countless OLED notebooks from Asus, Lenovo, Dell, and HP. Apple didn't go that direction because OLED is not a long term solution.
The blooming issue will be reduced as mini LED matures with increased zones. But even future versions of OLED are unlikely to match LED in terms of brightness or longevity (at high levels of brightness).