Rant on...
I don't have one as new as the CompM4 but have 5 units of the various generations of Aimpoint Comps, one going back as far as 20+ years and they've been the only dot sights to consistently fail out of the probably 2 dozen misc others I have. Two of them I picked up used/cheap because the original owner didn't trust them any more even after going back to Aimpoint for service and still glitching out now and then.
Can't tell you how many times the dot has blinked out in the middle of a firing string and has me twisting the battery cap and banging them on the bench to get the dot back.
I eventually found one big issue is that the boneheads used unplated brass for the positive battery contact and it oxidizes over time, requiring an occasional cleaning/sanding. A dab of dielectric grease after cleaning seems to help.
It's not abuse that kills them, it's time... and probably environment to a degree.
For perspective, an Ultradot was my first dot almost 30 years ago and it's still been 100% reliable.
Have a number of the good old japanese produced Tasco dot's that have never glitched, some on well used spring piston air guns which are notorious for destroying optics.
Maybe they've worked out the issues by now but all I use the Comps for these days is range duty, I'd trust my Pinty's more.
Rant off... lol...