Comment by account42

Android didn't win by being open source, it won by having Google backing it. In fact, that it is theoretically open source mattes neither to (most) phone manufacturers nor consumers (good luck actually making use of your software freedoms without being blocked by your bank).

Isn't a common newbie complaint about Linux that there are too many distros? So it really depends on how you want to count things. And BSDs still exists. So does Haiku and a few other niche operating systems.

Having many C/C++ compilers doesn't mean a thing if almost all of them are specific to one platform you don't use and half of those you can't afford anyway. And all of them have their own weird quirks.

Just counting number of competitors means nothing. That decreases in all industries over time, especially when there is little to no antitrust enforcement.