You're talking about choice, but software platforms are natural monopolies and the winner takes all. Sometimes there is room for a second place in case you carve out a niche, but there is no room for a third place.

So enjoy your freedom of choice, for now, but I remember a time when Microsoft was so strong that alternatives to Windows seemed destined to die.

And alternatives would have died, if Microsoft had their way with Trusted Computing ... and personally I could see Microsoft banning Firefox because "it duplicates existing functionality". But hey, Apple is cool, right?