It’s already no longer their golden goose. It’s about 6% of total revenue (see http://bullfincher.io/companies/microsoft-corporation/revenu...).
Microsoft could give Windows away for free and be fine. Of course it’s still a lot of money, so they’re not going to leave a multibillion dollar business on the table. But strategically, preserving its revenue is not their priority.
How many percent of their revenue funel are dependent directly or indirectly on windows beeing the peoples workstation funneling them towards their subpar products?