It's a shame there isn't a distribution (at least that I'm aware of) which is dynamic and modular enough to allow choosing your own "process manager" at install or even on boot.
Artix Linux does this. Arch sans systemd, and you have a choice between openrc, runit, s6, dinit, or even some combination of the 4. Any daemon type package will have a -runit/s6/dinit/openrc variant that includes the relevant scripts/configs.
this is correct, there's even a precompiled kernel (dist-kernel), it works great! and when packages doesn't match your system settings, portage will pull the source and compile them. it's great!
YMMV, I spend a couple of days last summer trying to get a Gentoo install with KDE running and after I changed something which caused a libc recompile, which took over an hour, I was so fed up I went back to Arch.
...granted, my potato only has an i7-6700 Skylake with 4 cores+hyperthreads for 8 threads at 3.40GHz, it's not one of those AMD Ryzen things, but still: I'm not running GNU/Linux because I want to buy a new PC every year.
Antix is essentially Debian for Dummies on crappy hardware running live in RAM, or otherwise unorthodox ways. It may seem ghettoish, but the thing about it is you can mod/remaster it most easily and make it YOURS without much fuss. And because of running from RAM it really flies.
Oh, that's interesting. I was vaguely aware of Devuan but I thought it's distinguishing feature (compared to Debian) was that it used ... _some init system_ that wasn't systemd.