Re: @Richard 12 - Trust is easily lost and slowly gained.
IBM may have stopped being so successful, but I don't remember anyone protesting against IBM and specifically *not* buying their stuff. They just found a better option, and went with it. Therefore, I doubt that Microsoft is going to see a ton of their corporate customers suddenly jumping ship. A few, yes. Maybe eventually all of them if the products don't work after several years. But I see no evidence of a large group of corporates getting tired of windows and removing it entirely. I see many corporates cheerfully using modern windows systems, and others still using windows 7 but without plans to move off windows when 7 becomes unsupported. I do not expect Microsoft to crash and burn.