Comment by ZeroGravitas

I believe Microsoft literally ran an advertisement suggesting that people were spending too much time on their phones. This was an ad for their own smartphones.

That's an interesting look into their corporate attitude at the time.

You could say that their Office app monopoly sabotaged their web browser (and the web in general) and their desktop monopoly sabotaged their phones (and phones in general) but both the web and smartphones proved stronger in the end.