I was contributing my viewpoint, my experience. As said, "for what it's worth". No need to be snippy about it.
Do we know it is random, though? It seems random to us, but they may be following some logic behind scenes. I know it would probably take an unreasonable amount of input world-wide to try an decipher any pattern, short of Tesla telling us definitely what the roll-out plan is. Even then it may change from release to release. As for my comment, merely a small blimp of a data point. If nothing else, these types of messages communicate between firmware-waiting people that we're not alone and forgotten.