It's a tricky thing, because shareholder value is entirely vibes based. Microsoft is demonstrably losing market share, approval from users, and functionality of the OS. While it's understandable to want to chase new trends, long term OS stability and compatibility for the average user was their golden goose, and they're killing it. We're seeing people move away from windows, which 5 years ago would have been an impossibility.
It's slow to act, but the more market share something like Linux gets, the more it tends to snowball in terms of public opinion. That definitely has the possibility of eating a significant chunk of MS revenue.