Python even has venv and other tooling for this sort of thing. Though, admittedly I seem to have dodged most of this by not seriously writing lots of python until after Python3 had already happened. With any luck the maintainers of the language have factored that negative backlash into future language plans, but we'll see.

Mostly I recoiled in horror at bash specifically, which in addition to bash version, also ends up invisibly depending on a whole bunch of external environment stuff that is also updating constantly. That's sortof bash's job, so it's still arguably the right tool to write that sort of interface, but it ends up incredibly fragile as a result. Porting a complex bash script to a different distro is a giant pain.