Dead pixels

It is not uncommon for a pixel in the strip to die. Not all straps stop working the same way. It would be helpful to have a list of dead pixels that are automatically eliminated from all segments.

The existing segment arrangement must continue to work as is. Dead pixels are just turned off all the time.

This would only be useful (IMHO) for WS2813 style strips that are “self-healing”.
Identifying dead pixels on a WS2812 or SK6812 strip might be a nice idea, but the rest of the strip typically stops responding after a dead pixel making any further changes moot. The segment effectively becomes useless after the dead point.

Just my $.02

If you can reach them, it is fairly trivial to cut out a bad pixel and solder a new one in its place.

The WS2813 and WS2815 strips have a backup data channel so the remainder of the strip continues to work when a pixel goes bad.