If you use Ruby with rvm or asdf the gems go in a directory inside your home, named after the ruby version you are using for a given project and possibly a gems

If you use Ruby with rvm or asdf the gems go in a directory inside your home, named after the ruby version you are using for a given project and possibly a gemset you defined, so two projects with different dependencies but the same ruby don't interfere with each other. Or just use bundle and activate only the gems in the local Gemfile. Or use docker and put everything inside a container. If I can complain about something is that there are so many ways to do it that I can't remember their details when I'm away from my laptop, as I am now. I think that I have at least one occurrence of all those 4 methods on my laptop, for different customers. They decide and everybody makes a different decision. Other languages: same problems with different tools.