The problem is it's impossible to prove either way, just becouse they haven't done any extinguishing in over a decade doesn't mean any of the theoretically positive things they are doing don't have those intentions, embrace and extend aren't antithetical to contributing to open source, in fact I would say what they are doing is embracing it pretty well

If not for their history I'd say it's great! But this is Microsoft we're talking about, even if they have changed we shouldn't just assume their intentions are pure