Think it's just fear of the unknown. People are comfortable using Windows or Mac and have heard how 'difficult' Linux is to use over the years so why switch.
Everyone I have switched over to Linux always says the same thing "I wish I had done this earlier"... most of these are not 'technical' users.
Today with most people doing a majority of things online Linux is a great platform, it's just not convenient for most people to switch.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.