

Glibc matters on desktop, but the speed advantage doesn’t really matter to services running in cgroup2 containers borrowing the host’s kernel and namespaces.
For op’s purposes, memory density is important, and alpine base images will need about 10x less memory than their Debian counterparts, mostly due to a very pared-down service layout.
There’s a reason a huge portion of docker images are alpine-based.
That is incus. But similar in other implementations of LXC. Docker has similar ratios, but I suspect you know this already.
That has been fixed since 3.18.
Look, I’m not sure why you’re challenging me so hard on this, I’m not a superfan of Alpine or anything. I use it when I can because it’s really, really light on memory and so do others. There are lots of cases that don’t work with Alpine, like mongodb, sql, etc. But there are lots of great uses for alpine as well, like networking or anything that works well with busybox tooling.
Have a better one.