A large retail chain, Casas Bahia, with 53K employees and $billions in revenue (2008) ran Suse GNU/Linux on mainframes and POS (point-of-sale) systems with zero failures in five years giving real-time information on every transaction with security.
Police, government offices, and schools in Brazil all find GNU/Linux usable, reliable and cost-effective. What about you? Are you getting the best performance for expenditures on IT? In Canada, I switched to GNU/Linux years ago because I was not getting good performance. Machines were slow, crashing, and interrupting our work. We switched to GNU/Linux and have had few problems since. We got better performance on identical hardware. We were allowed by the licence for GNU/Linux, mostly GPL, to run the code and make as many copies/installations as we wanted all for $0. That other OS limited us to connecting 10 machines on a network, phoning home, recording “certificates of authenticity” and other awful procedures wasting our precious time. Effort required to use the system and to maintain it fell sharply and we made much better use of our existing hardware. It’s all good.
If you wish to try GNU/Linux, I recommend Debian GNU/Linux. It’s been around a long time, has millions of users, and a reliable method of updating the operating system and the applications.