Hello AlpineJohn,
I’m writing this on the machine right now 
With just a couple of days of use I can say the Mate version preinstalled is ‘working’ as expected.
The main issues I have at this moment is rather the migration from my old Apple applications to linux counterparts (with such questions as ‘what could be the app for handling my paper books library with more than 1000 titles and comments’…), much less with Mate and hardware.
What I can say is visibly all the present hardware is neatly supported (all interfaces, both internal SSDs…); the main burden coming from my incompetence in adding drivers (printers…) and these apps not prepackaged in the Ubuntu standard distribution. So as you can see more of a beginner issue than hardware related
By the way I posted a description of the hardware on the forum here
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