A hiring manager for a Java position once asked me in the interview if I knew Smalltalk. I said no. He said "Good, if you did, then I wouldn't hire you." He said that Smalltalk requires a strange way of thinking that would make you a bad developer.
And yet I've seen multiple people on here and other forums say that there's no need to buy a new computer nowadays since a 5 year old CPU can handle everything. Obviously not even a 1 year old CPU can handle modern web pages.
Share price by itself doesn't mean anything.
Google market cap: $540B
Apple market cap: $580B
MSFT market cap: $470B
MSFT up 50% in the past year, catching up with Google and Apple, so Nadella sees no reason to change their path.