I haven’t seen any breakage, although you may find documentation assumes SystemD. Debian maintains init freedom, and support for sysVinit was improved in Bullseye, so it’s not being forgotten about.
If you don’t fancy going that route, there are Debian forks that are designed to be SystemD free such as Devuan or MX linux, which defaults to sysVinit. I’ve not tried either, but they seem well regarded, and I’m sure there are others too.
Debian works fine with SysV init currently, there’s even a page on their wiki on setting it up: https://wiki.debian.org/Init#Changing_the_init_system_-_at_installation_time
Source: have been happily using Sysv init on Debian for years. Working on SystemD servers feels incredibly painful in comparison.
Maybe I should take a stab at it, I knew it was maintained in some capacity but I thought most of userland would break without Systemd
I haven’t seen any breakage, although you may find documentation assumes SystemD. Debian maintains init freedom, and support for sysVinit was improved in Bullseye, so it’s not being forgotten about.
If you don’t fancy going that route, there are Debian forks that are designed to be SystemD free such as Devuan or MX linux, which defaults to sysVinit. I’ve not tried either, but they seem well regarded, and I’m sure there are others too.