I work in about 5-10 versions of Elixir depending on a similar number of specific Erlang versions. At any given time. Also 2-3 NodeJS versions. It is quite hel

I work in about 5-10 versions of Elixir depending on a similar number of specific Erlang versions. At any given time. Also 2-3 NodeJS versions. It is quite helpful. Also incredibly practical when chevking whether Library X will work on an older version. I do open source and consulting for clients. I deal with a lot of projects, my own and other's.