> Things not working the way I expect means I have to do more work to figure something out.

I dunno, "things not working the way I expect" is very subjective.

I personally think it makes more sense that processes do not outlive the parent from which they come (in this case processes spawned from a user shouldn't outlive that user) unless you explicitly go through something which outlive the parent (process manager in this case (e.g. running via systemd-run)).

Though I am also strongly of the opinion of just because something is a feature, does not mean it is good to keep around, e.g SUID/SGID (which has a similar "I get more than the parent" problem).

Though I guess different people can have different opinions/values on this.