Yeah, well, after the latest (in a long string of) test results from Rtings on OLED image retention and burn in - most here are interested in the QLED because they don't want OLED.
The new 2019 QLEDs, from the reviewers who have seen them, are the closest thing to OLED without having to worry about image retention and burn in.
They also are much brighter, able to portray HDR content much better, and have a higher color volume.
I would guess everyone in here knows the pluses and minuses of each tech. - and is here because they are interested in what QLED has to offer.
TV: LG C9/C10, or Samsung Q90R, or Sony ...
Blu-ray: Panasonic UB820, or Pioneer Elite LX500, or Sony X800M
AVR/Pre-pro: Marantz 8805/7705 or 8012, or Yamaha 5200 or 3080
Speakers: GE Triton One.R, or ML ElectroMotion ESL X