I tried out the data explorer query and see that in the last four weeks we’ve collectively moved 53 topics out of Support into other categories. That is enough that it would definitely be inconvenient to have to ask a moderator to remove the automatic timer.
So back to the drawing board on figuring out how to ensure that everyone who posts in Support gets a timely response!
Looks like adding the timer cleared the category setting when topics that have been marked solved will be auto-closed. I set that to 72 hours now because I don’t recall exactly what it was set at before.