After reviewing all the OLED pro comments, the OP ultimately purchased a Samsung Q90R LCD.
OLED black crush, motion judder, poor auto brightness limiter, image retention, burn-in, etc. probably contributed to his decision even though quickly dismissed/diverted when brought up in discussions. I know these are high on my list of unacceptable attributes and how anyone can promote them as normal or pretend they don't exist is beyond me. These things are bigly and unqualify for most bestest imo. I won't go into detail about these common OLED problems. Instead I'll play devils advocate and bash my LCD that I prefer.
Light blooming on LCD's is very real. I own one. This is probably the largest complaint. It's honestly my only complaint and I live with it because I find it acceptable given other faults I would inherit had I went a different route like OLED. Truthfully, I never see it during movie playback, cable broadcast, or any other source. I've looked intently for it and never saw it ultimately forgetting to look anymore because it never reveals itself despite being ahem, educated that it should.
However, I should not use the word "never". I do notice it during credit roles after the movie plays, when I could care less. White letters against a black background that goes on for minutes of credits has flash lighting constantly. My black bars are inky black after calibrating. The same depth of black as when the screen is off. I read comments that LCD can't get this deep. I must have a miracle here or the commenters are blindly commenting. I know the pride OLED commands in its blacks. Personally, I don't think it's cornered anything given my own results and without any crush mind you.
I place subtitles below the video in the black bar to avoid blocking the picture or worse yet, blending with a like colored background becoming camouflaged. Under this condition I see light bloom in the bottom corners of the black bar only and it is slight. Very slight. It doesn't interfere with the video at all. I could eliminate it completely by crushing the black calibration (yuck) or raise the subs into the video (yuck again). I also notice light bloom when I boot my PC (I use this display as my PC monitor too) as all the boot info against the black background appears. Again, I could care less tbh. I use a black desktop background. There is no blooming unless I place white icons on the desktop which is rare. These are honestly the only times I see the most common complaint about LCD's... light bloom.
Off angle viewing isn't the best either but myself and my guests are in front of the panel, not off to the sides where it becomes troublesome. Truth be told, I don't care what kind of display or PJ you have. Anytime you move off too far to one side or the other we all have an inherent problem. Off axis aspect ratio of sorts. Download a picture of a circle from google. Display it. Look at it head on. It's round. Move off to one side or the other. It's oblong. I could care less how colorful oblong looks. When Captain Americas shield isn't round anymore, I need to rethink where I'm sitting rather than how red, white and blue the shield remains. Faces are even more disturbing.
This is a little testimony regarding fake news, over amplification and real world examples.
This goes into a little more OLED con details based on the authors opines -