There is also no precedent for Apple making any kind of pro-active design choices around future regulation. They clearly are the kind of company that does whats

There is also no precedent for Apple making any kind of pro-active design choices around future regulation. They clearly are the kind of company that does whats best for them and when asked to change, nudges in that direction, and then moves on. This is in the DNA from the top down. It would certainly be weird to make the decision about third-party OSes be about that.