Well, my experience was
- why a service misbehaved, can't get smart from that log dump
- configuring DNS, got annoyed that it was yet again something Systemd does itself and in a poor mans way, despite there being tools and standards for tens of years.
- Then found out about their security track record and that it all runs as PID 1 (more power than even root)
All in all, it works very contrary to my experience that layers upon layers leads to unmanageable complexity and inefficinecy and it's all implemented in a poor way, functionally (some will likely disagree to this).