What?

You can install Linux alongside Windows, it takes at most 1 min or so to change from one to the other.

You can run one inside the other inside a VM (some do so, if the office doesn't allow them to install a new OS)

You can even install Ubuntu from inside Windows as a program, with Wubi (or any distro with Unetbootin).

Just because the common people don't know how easy it is doesn't mean it isn't. There is no choice to be made if you don't want to; just as with bitcoins. It's only the difficulty to start using something new and different, not pushed and supported by some huge corporation.