@5f9bb1a8 one of my biggest challenges has been "turn all that crappy Linux shit into Microsoft now that we’re grown up". Which meant I had to trash mostly all my OpenBSD and Linux servers to install VMware, Dell Storage and Microsoft services.

All in all, it was a great experience. I now really know why I hate those. But regarding the switch itself, I discovered how company would rather rely on other companies (with paid support) rather than on people’s skill. 

 @c5bac664 True. They buy support contracts, not people's skills. 
I was surprised when one wise client said: "I prefer paying a skilled person than relying on companies with 10 young and unskilled techs, wasting time and just following the manuals"