Systemd usually can’t be in the same repo with other init systems/service managers (or with shims and hacks) *, while they themselves happily coexist. This is the Reason that there are non-systemd distros, not some unreasonable hate for new thing or anything.
* Yes, except Openrc, which was made as a drop-in for Systemd.
Not specifically about systemd, but some things can’t be backwards compatible because they might want to just do things different.
Nobody was forced to change, the distros saw the options and decided in favor of systemd, the same they decide a million other things.
Systemd usually can’t be in the same repo with other init systems/service managers (or with shims and hacks) *, while they themselves happily coexist. This is the Reason that there are non-systemd distros, not some unreasonable hate for new thing or anything.
* Yes, except Openrc, which was made as a drop-in for Systemd.
Red hat dominated the market and pushed it on out. You must remember this, don’t you?
I’d encourage you to go read the discussions Arch Linux and Debian had before deciding to go with systemd
Edit: fix grammar