The reason it's specifically important to me not to clean at boot is that schroot bind mounts /tmp by default but does not bind mount /var/tmp by default, so I am accustomed (since long before the systemd behavior became the norm) to using this directory for sharing data between the host system and chroots and relying on it persisting across reboots (since it's not old). (And I don't use /home because it's stuff I *do* want garbage-collected for me - just not at reboot!)
When you say you've "become very accustomed to the current behavior where /tmp is emptied on reboot" - how would it impact you if it was NOT cleaned at reboot?
The reason it's specifically important to me not to clean at boot is that schroot bind mounts /tmp by default but does not bind mount /var/tmp by default, so I am accustomed (since long before the systemd behavior became the norm) to using this directory for sharing data between the host system and chroots and relying on it persisting across reboots (since it's not old). (And I don't use /home because it's stuff I *do* want garbage-collected for me - just not at reboot!)
When you say you've "become very accustomed to the current behavior where /tmp is emptied on reboot" - how would it impact you if it was NOT cleaned at reboot?