"Steve Ballmer nearly killed Microsoft. He thought smartphones were stupid. Thought the cloud was dumb. And did a few more things that were just egregiously stupid and took on a lot of debt. Their new CEO is doing a great job though. He also launched office 365 as a subscription service when Google Docs was free."
#21 Microsoft bought out Skype, it's loaded with Windows 10. Now they have Teams and are killing Skype for Business to force businesses and schools to use Teams. Skype Personal will still be available for a while.