Did I switch to Linux because of MUI?
Not entirely, not on it's own, anyway. It's a culmination of a number of decisions in several areas, by MS. First, it's the direction hinted at by Office365. I'm NOT going either cloud-based, or subscription, on software like that, EVER ....
Also, some of the decisions over XBox One, like 'always on', and mandatory, built-in, always-on Kinect. Well, always-on to work is not acceptable to me ....
Then, there's MS's increasingly persistent drive to coax, pressurise or nearly force users to have an MS account, ....
So no, it wasn't MUI, on it's own, that forced me to evaluate Linux, and Linux apps. It was increasing nervousness that MS are going down a path I'm not prepared to agree to, and that sooner or later, "pressure" would turn into an Adobe-style 'take it or leave it'. And, in preparation for leaving it, I decided to invest some time in exploring alternatives.