The TL;DR is now pixels get tracked for how long they’ve been lit. Then the device can evenly burn out the other pixels so the usage is uniform. The trade off is you are going to lose max brightness in the name of screen uniformity.
The other point is a shifting of the TFT layer that people think is burn-in, but it’s actually image retention. But, it is solved by these TV maintenance cycles. Just hope that this compensation cycle actually runs since some panels just fail to run them.
Checkout this RTings video for a good overview of lots of different TV brands and how they perform.
PS: Burn-in is actually a misnomer from the CRT era. There’s nothing burning in; the pixels are burning (wearing) out.