Read the article. Satya brought the share price from $35 to $400, that wont kill Microsoft.
I guess what you’re trying to say is that it will kill Windows. But that wont happen since enormous percentage of businesses run Windows ecosystem.
Lets face it, Windows is in maintenance mode, pointless for MS to invest heavily in it since there is no threat for businesses switching to Linux or something else. MS devs primary maintenance job these days should just be scrabling MS Office API every 6 months or so to break Wine and other Linux non-emulators. Wine devs in constand rearrange deck chairs mode, while Win32+Office devs just add a new parameter to an API interface in their 6 month cyclic undocumented API breaking scheme.
You need a better Office than MS Office to break the cycle, and this will be a Web based office / collaboration tool. And guess where MS Azure and Web services fit in this brand new world.
Microsoft dominance aint going away in our lifetimes. Only non US government pressure may force other countries to switch to a flavour of Linux due to US sanctions. Only then can you see a visible migration from Windows. This is a decades long process.
He is definitely killing Windows though. Lack of quality of foundational products do not affect share prices until several years are gone. You will only see an effect in 2029-30, users slowly migrate away and license contracts are slowly dropped. I guess blame will fall on the next CEO and Nadella will be lionized as most successful CEO of Microsoft.