@atpfm the green patches Marco referred to on his TV are due to the red pixels degrading. The center of the screen is where faces appear the most, and they have more red than green or blue, resulting in uneven wear. I have the same issue on a 2017 Panasonic OLED (plus serious burn-in from a red broadcast network watermark). Connect a Mac to the TV, and you can see the individual colour burn patterns as part of a comprehensive browser-based monitor test at https://www.eizo.be/monitor-test/

@tommarmstrong congratulations - that's an amazing achievement!