There's also https://github.com/termux/proot-distro which may or may not count as containers depending on how you define the word but I think it does count
yeah you can do some smaller fakechroot and maybe some bind mounts... if you call that a "container" good for you.
Sure looks like it works?
$ unshare -i -n -p -u -T -r -f # ls # id gid=0(root) groups=0(root),65534(nogroup) # ip -br a lo DOWN
Why are you being condescending about what constitutes a container?
There's also https://github.com/termux/proot-distro which may or may not count as containers depending on how you define the word but I think it does count