My go to for most of what you mention is Go, but that’s obviously a compiled language and not for scripting. Or is it - What do you think about https://github.com/traefik/yaegi, which provides an interpreter and REPL for Go? It would let you use a performant and well documented language in a more portable scripting way, but not preclude you from generating statically linked binaries if and when that’s convenient.
Also worth mentioning that as the ISS was being constructed, its planned retirement was to be about 2015. We’ve been able to massively extend its operational period, which is awesome, but the materials can’t last forever.