Microsoft never did understand Lotus Notes. It was like a alien language. They just didn't get it. I experienced this first hand, having worked with both Lotus and Microsoft. When Gates hired Ozzie he hoped that MS would get his vision for the Internet. Even after Ozzie made huge headway with Azure, the Windows 8, 9 , 10 people still didn't get it. They just want to do fat OS's, Office and dabble in media. I though Balmer had Ozzies back, but if he tried, he just didn't get it either. In desperation, Ozzie decided to leave (I am guessing) because MS could have been the leader in the cloud with the only true operating system designed for the cloud. Now MS will just be another cloud player and the legacy OS, et al people will keep driving the company into the ground. Well, they had their chance.