"""Every person uses a different subset of C++, but that subset varies from a group to the other. You cannot therefore "remove features of C++""""

Actually you can. You don't remove them from the existing language that is, you make a better language with bs/redundant removed.

While "every person uses a different subset of C++" is true, it's not like everything someone uses is equally beneficial to have in a language. As the parent said, what is useful and what is not is not that controversial:

"I've seen three groups independently come up with essentially the same C++ coding guidelines (the Google C++ guidelines are a great example), all deprecating large swaths of the language"