This feels quite dismissive to me. I dont see the appeal of any of these three options, given how well systemd.timers solve all of this today & how nicely they compose.

The whole point is to not need to keep running into a bunch of artisinal handcrafted did-it-myself shell scripts every time come to a system. Being able to compose timers that trigger units enables this nicely with a lot of flexibility. Managing them separately is powerful & makes sense.