I can attest sa robustness of this Sony Full Array...meron kami nyan 65X90H na ginamit na static monitor for CCTV sa office and ads display and still lije new pa rin fot almost 1.5yrs in 24H duty.. picture quality is very close sa OLED.
My only major issue with Sony is that a lot of their apps run at 1080p and are scaled to 4k / 8k. You can validate this by opening Youtube and enabling stats for nerds. If the viewport says 1920x1080x2 or 1920x1080x4, then the app is running at FHD natively then scaling the image. My dad and I have Sony TVs that are stuck in this mode so I rigged PCs to them that do play at the native resolution.
Their earlier 4K models did run at 4K, but I believe those were also updated to 1080p for interface smoothness and so that frames don't get out of sync/dropped. My brother downgraded his old TV to the original firmware to enable 4K as he was okay with the glitches.
Other brands may run the interface at FHD, but will switch to UHD during full screen video playback. The Sony TVs apparently do not for most apps. This allows the interface to overlay smoothly over the video playback, but it hurts image quality. There are online threads about this flaw. I don't know if the flagship models have this problem, but anything upto the A8 / X9 series seem to suffer from it to this day.
Update: Just found out that they're running new SoCs on their 2021 models. Hoping that they rectified this problem on their latest units. Their new SoCs (probably also from Mediatek) are supposedly able to handle HEVC, VP9 and AV1 at 4K (no 8K support for the smart features, even on 8K units). This is an improvement, though still a step behind the competition that have been able to run 8K AV1 since last year.