In the industry, Linux is more popular as a server platform (database server, web server, app server), not a client platform. If you're on a very tight budget, then Linux with an open source produtivity suite can replace MS Windows and MS Office, but the difference in cost is really quite small as you can purchase MS software, one or two versions old, for almost nothing.
A few years ago, I setup an old PC laptop with minimal CPU & memory on a lightweight distro of Linux just for learning and experience. I thought it sucked, so I replaced it with MS WinXP SP3, one of the most robust client OS platforms we've ever had.