8. "Its TCO is higher"
Last, but not least, proprietary vendors are notorious for trying to counter Linux's free price tag with vague fears about its "higher" total cost of operation in the long run. All I can say is, if that were true, why are so many governments and organizations around the globe turning to it in droves, particularly during the tough economic times we've had over the past few years?
There are also numerous studies confirming the financial benefits of Linux in a business setting, even with paid support. It's worth noting, too, that TCO doesn't explicitly capture the future costs that will be incurred by being locked in with a particular vendor.
Is Linux perfect? Of course not; no operating system is. Nor is it necessarily the best choice for every business. But don't let the myths hold you back.
Follow Katherine Noyes on Twitter: @Noyesk.