The modern statically linked languages (I'm thinking of Go and Zig specifically) increasingly need less and less of the cruft you mentioned. Hopefully, that trend continues.
> no users
I mean running as root. I think all processes on Linux have to have a user id. Anything inside a sandbox should start with all the permissions for that environment. If the sandbox process wants to muck around with the users/groups authorization model then it can create those resources inside the sandbox.
The things that break in C if /proc/self or the terminfo DB are missing will break in Go and Zig too.
What I think you might mean is something like: "in modern statically linked applications written with languages like Go and Zig, it is much less likely for the them to call on OS services that require these sorts of resources".
> no users
I mean running as root. I think all processes on Linux have to have a user id. Anything inside a sandbox should start with all the permissions for that environment. If the sandbox process wants to muck around with the users/groups authorization model then it can create those resources inside the sandbox.