@admiraljkb
My cynical side thinks that far too many people saw the change to Win10 as a leap too far, and if they had to handle that much change they might as well go for Ubuntu/ Mint, this would allow these people to put a foot into that camp while remaining firmly tied to ms' apron strings.
My whimsical side remembers a PC User Group meeting in London around 1985: a senior honcho from ms UK said that the next version of msDos would be binary compatible with Unix..... at a meeting a couple of months later this was completely pooh-poohed -then they handed out free copies of Windows 1.0 - on a good commercial PC of the time the windows part was so slow as to be unusable (the underlying was still Dos).
My realistic side sees this as a possible alternative to Win10/Ubuntu dual booters.
(The tricky bit may be threads/ processes).