[int0x80]

Yep, I was complaining a bit of the move to systemd. To run a binary (that acts as a daemon in the end) with no especial handling needed by the OS and nothing fancy (just run at runlevel 3, I don't even need a "clean" shutdown, everything is handled by the process) I couldn't find a simple way to do it without systemd. The /etc/init.d/ directory was under control (!!) by systemd. The binary wouldn't even run manually, systemd intercepted the process running from that directory. So I had to write a systemd service file. Not a big deal after all, but I didn't like it.

About the timers in systemd I haven't even look at them. As long as I don't need them I'm fine with 'cron' and 'at'. Maybe they are not the best posible systems, but IMO work quite well (and I don't have to change my code to use them). If at some point I encounter problems or limitations with my uses of cron and those are fixed by systemd I will happily update to systemd timers. For now the work perfectly fine for my needs.