I thought I'd given sufficient clues that I actually do in fact know what virtualenv is. I was hip-deep into python when it was introduced, and thought it was a clever hack, but it's relying on python being compiled to find its libraries in a path relative to the python binary, so rather than use something sensible like a launcher that sets PYTHONPATH to a local dir like every other language does, it hardlinks the python install into the local dir in order to pretend everything is a system-wide global install. I always figured that hack was a temporary workaround, but it's going on a couple decades now.

As for the screaming, I'm talking about pip, which has the unique property of just refusing to work by default unless you use --user (what most other package managers now call "global") or are in one of these pretend-global environments. Ultimately it's just a paper cut, not a show-stopper, but it points to not just a failure to address the pain points of the package ecosystem, but a seeming refusal to do so.