Alpine also runs on ARM platforms, and by using musl instead of glibc it consumes a lot less resources, at the price of some (thankfully rare) incompatibilities here and there.
For reference: https://wiki.musl-libc.org/functional-differences-from-glibc...
Had heard of Alpine and used it plenty for containers, yet hadn't heard of Clear Linux before. Nowadays I just use Ubuntu for my container images (due to the same environment as my dev machine which simplifies things for me), but there's also a lot of benefit and elegance in more lightweight alternatives.
[2]: https://hub.docker.com/_/clearlinux/tags