It’s not just an init system and you can opt into resolved, networkd, etc. but you knew that already!

No, it does what I want well. It never surprised me.

No. It’s great, replacing and unifying a whole collection of random tooling you otherwise had to cobble together yourself.

What does it do as an init system that is too much?

Not really, no. Systemd-init seems fairly focused. systemd the project also makes other stuff, which all neatly fits together.

Just being able to treat period tasks the same as I treat long-lived services, and never having to think about crontab vs cron.d vs cron.hourly vs /etc/crontab, has improved my quality of life dramatically.

I also use systemd-timesyncd / networkd / resolved on most of my systems, but in places where I've wanted to not, swapping them out is as easy as swapping any other services (looking at you, rsyslog and syslog-ng).