The first point equally applies to Alpine and any system built from Debian minimal install ("built" is too strong a word, all you need to do is `apt install` several packages).
I had a fun experience playing with `grml-debootstrap', GRML¹ being a command-line-oriented LiveCD built upon Debian. Once you’ve booted up, that app installs a minimal Debian instance on your computer. I haven't tried using the stock Debian `debootstrap' utility.
If you just need a plain system to drop a statically linked binary onto, Debian minimal install is perfectly usable right out of the box, and (IIRC) ships fewer components than OpenBSD.