As Michael said, this belongs on python-ideas, but it's interesting. I'd
support it, though my input in that regard is worth approximately $0.00. ;)
It's the core devs and especially the eventual BDFL replacement whom you
would have to convince.
Without getting into an extended discussion here on python-dev, I'd like to
offer one brief comment to try to help improve the proposal:
On Fri, Sep 21, 2018 at 2:17 PM
Let allow fallthrough or not? - To be decided. (Either is compatible with the above.)
I would argue for non-fallthrough as the default with support for explicitly requesting fallthrough when desired by using "continue". I don't know of any prior art for doing it that way, but it makes sense to me. It eliminates hidden bugs from missing a "break" while still allowing it when needed. Good luck with the proposal!