[nevi-me]

I'd imagine semantic versioning to be more subjective with a language that relies on a social contract, because if a user chooses to use those private fields, a minor update or patch could break their code.

It does feel regressive to me. I've seen people easily reach for underscored fields in Python. We can discourage them if the code is reviewed, but then again there's also people who write everything without underscores.