Absolutely. I think the actual issue are the OSes directory structure(FHS for example) that impedes having libs/packages isolated and coexisting with their diff

Absolutely. I think the actual issue are the OSes directory structure(FHS for example) that impedes having libs/packages isolated and coexisting with their different versions. Containers add a heavy abstraction on top of that. For me the simpler/better dependency management solution is nix.