By habit and marketing, in the same way that Android that has Linux kernel has 80% of mobiles, if google would not have money surely no one would know it.

A particularity that I see is that technicians never recommend Linux, the problem is that Windows is known that every now and then there q formatting by virus or simply gets slower and if you install Linux that does not happen and have no work.

I use Linux since 2001, since 7 years ago Linux mint and is tremendously friendly, fast and stable as to migrag any Windows user, there is even software like WPS Office which is a clone of free office and clones or similar of the most used programs.