It will still grow a lot. I have seen clients who are required to use LICENSED Stuff, as a part of Statutory Compliances. And they are so large, that they just cant afford to buy that many Windows/Macs. Best option - Go Open source! This factor actually pushes me further to have good hands-on experience with this platform.
Actually i have decided that when i get a new Hard drive, i will have a separate partition where i will keep on experimenting different Distros of Linux. 1 Permanent Windoze for specific apps. 1 permanent Mint for day to day use & 1 partition where i keep experimenting. With a backup of material data on the External HDD.Just waiting for the Internal HDD to return!