It would be nice if the @singledispatch decorator worked on instance methods.

I have a reference implementation on pypi that does this (https://pypi.python.org/pypi/methoddispatch).

I posted this message to python ideas a month ago (https://mail.python.org/pipermail/python-ideas/2016-September/042466.html) and got 100% support from 1 response.  

Not sure if I should proceed with writing a PEP.