/tmp and /var/tmp

In my world, if one uses applications that place there temporary files in /tmp and produce several GBs of them, it is surely *not* gross user incompetence if one decides not to spend one's time trying to detect how each and every of these apps can be persuaded to place their temporary files somewhere else. Instead one just gives /tmp more space. In my world, this is called pragmatic. Maybe you've heard of that term, but with your quick judgement of others, there is some doubt about that.

Maybe that information is new, but setting aside a few hundred GBs of disk space for /tmp is not really a problem with today's disk sizes. The 90s are over, really. And in no way that stops /tmp from being purged at reboot time.

Btw, if I would really clean out every day all /tmp files not accessed in a day, my desktop would not function any more. /tmp cleaning while user sessions are active needs more care than such coarse treatments; it needs blacklists, and most often also longer retention times.