@J1nx has already made reference to the guy that has the answer to the original question - BigCliveDotCom on YT has got loads of videos on leds and driver circuits, and if I remember correctly has actually repaired led arrays similar to the ones you describe. In short, they all seem to be working at the upper end of their limits and with some simple mods could be made to last a lot longer. As others have said, it’s usually one or two of the surface-mount leds that have turned their toes up (sometimes lack of heat sinking), and it’s possible to replace them or bypass them with a steady hand and a small soldering iron.
Here’s him fixing a decent quality module
Here’s him fixing a decent quality module