Web assembly is a good step in the elimination of the globally shared FS. Dynamically linked libraries are explicitly provided with an index only that links to the library location. https://webassembly.org/docs/dynamic-linking/

WASI https://hacks.mozilla.org/2019/03/standardizing-wasi-a-webas... will provide access to files given to the function by the runtime, not vice versa as in operating systems where a syscall is sent to ask permission for a file.