Perhaps because these people consider that solving all the problems that systemd claims to solve does introduce too many other problems, so they tend to consider it to be the better solution to solve, say, 90 % of the problems that systemd solves, but introduce less new problems.
My recent experience was trying out Fedora atomic. I love that idea. I found systemd is kinda nice for service management.
But still, I kept running into issues with it spreading into everywhere, doing its own thing, and difficulty working around it. Partially figuring out the atomicity, and partially that no other distro I've tried has leaned in that hard to systemd.
I'm moving on to Arch since it looks like I can at least get this out of my boot process.
(Or, more on the topic of the thread, Tumbleweed looks like an interesting take on being able to roll back to known working states as a replacement for Fedora atomic.)
There's also SixOS coming soon (https://events.ccc.de/congress/2024/hub/de/event/sixos-a-nix...). NixOS does kind of a similar atomic thing, so you might enjoy that, but vanilla NixOS is systemd based, so once SixOS drops you might get exactly what you want.
I saw some of that SixOS and I am really interested. There was an "ownerboot" tool they linked to that also looked nice to me.