systemd parses your crontab and runs the jobs inside on its own terms

of course you can run Cron as well and run all your jobs twice in two different ways, but that's only pedantically possible as it's a completely useless way to do things.

Not stopping. Just clashing with that and a hundred other things that I never wanted managed by one guy. Systemd.timer, systemd.service, yes, trivial, but I don't catalog every thing that bothers me about systemd - I just stay away from it. There are plenty of better examples. So where ever I wrote 'stop', it should read hinder.