> I'm not overly found of timer units, either. They seem feature rich but much more complicated to setup than a single line in a crontab.

I’ve twice tried to use them. Closest I got to having one work was that it reported it ran, and didn’t error, but it did not run. Extremely simple cases that were basically copy-paste an example and barely modify it, too.

Oh well, add a line in cron and forget about it.