I've never used Alpine. I use Arch on my Pis (and odroids) and find it's a good compromise between ease of use and minimalism. I'm not a systemd hater so that's not an issue for me. I don't find it too intrusive.
I'd be interested to know if anyone uses Alpine and what their experiences are. I used to use Slackware by default but the base install wasn't minimal enough and I found the rolling release a bit too unstable.