That's funny. To me one of the whole point of containers is that it's not systemd that's PID1.

Combine that with a distro like Talos, an immutable Linux distro that contains less than ten executables and where none of them is systemd and...

At long last containers and stuff like Talos show a path leading to, in a not-so-distant future, a world where we can be systemd and [ini]/microsoft config files (from a microsoft employee btw) free again.

It's not about running systemd in the container (practically nothing does that, though I myself considered it for a multi-user ssh shell system), but making containers manageable under systemd alongside other units.