Agreed, but Microsoft could probably delay things for long enough to hurt Google sufficiently. It might be enough simply to auto-install it, hook customers on

Agreed, but Microsoft could probably delay things for long enough to hurt Google sufficiently. It might be enough simply to auto-install it, hook customers on ad blocking, pay the fine, then send out a patch to make it opt-in only. My guess is that at the moment it seems that the DoJ really has its eyes on Google, and Microsoft doesn't want to pull a stunt like this and distract them.