https://github.com/yaegashi/muslstack https://github.com/yaegashi/muslstack seems to indicate the limit is coming from musl (the libc) rather than Alpine, which

https://github.com/yaegashi/muslstack https://github.com/yaegashi/muslstack seems to indicate the limit is coming from musl (the libc) rather than Alpine, which may legitimately have a hope of running on small platforms.