As a long term investor, I'm worried with Google. All the bills are paid by ad revenue, a single horse. Then there is this bubble of claims that they have the best engineers and work environment yet this has not produced any other business equivalent to the ad business. Then they have a reputation of creating awesome tools that then get killed in years, enterprise customers don't like this unpredictability. Microsoft on the other hand is the master of supporting old platforms, I've seen some really old apps (from the 90s) run on the latest OS's. Enterprise loves this and that is were the money is. The only clear strength I see on Google is that they are masters of advertising and I see how they sell to developers that there way is the way to go. That is a good HR strength since they will always have a pipe of engineers that want to work for them.