Re: te real issue is...
"...that a MS set of tools is something people spend years learning how to use, and then are lost if they dont have"
I always amazes me that when Microsoft completely change their long-standing UI (Ribbon in Office and TIFKAM as the obvious examples), that users and companies seem to just shrug their shoulders and learn the new way. There might be a bit of moaning, but almost nobody sticks two fingers up to MS and cancels their contract.
And yet there is alway massive resistance on all levels to migrating to a package which is non-MS but which may even look and feel very similar to the MS product. It's just weird!