Hum, why not, although people having a system predating this change (which is exactly 2 years old apparently) will suffer from this, while more recent systems are likely to provide compatibility for a while, given how widespread use of the `pep8` tool is. For example, my Debian system has a link from `pep8` to `pycodestyle` which makes this a non-issue there ATM.
So… I don't feel strongly either way, but it probably makes sense to merge this *at some point*, but I don't know if now's the time?