Hi to all,
I have an XEL-1 as a daily watcher (+/- 3 hours) since 2012 and have noticed no visible hue shift/banding in any color.
Maybe tied to Sony's Top Emission OLED technology, i don't know.
True, i do not watch CNN, Fox or channels with proeminent logos/banners.
Our Euro channels have discrete logos.
I also have no experience with large size (45" & up) made by LG, Samsung, etc.
I would like to point out that Sony currently sells something like 7 OLED models in its Broadcast product lineup. Television Broadcast engineers would surely not accept to spend multi-K$ on display devices exhibiting color inaccuracy & drift and not maintain performance for several thousand hours.
Trinitrons were a legend in their heyday and Sony has to keep up that good reputation.
https://pro.sony/fr_FR/products/broa.../lmd-a220-v3.0
just my 2 cents....
Best Regards
jhalphen