Didn’t .net core depreciate the older .net framework stuff, and by extension Mono, and the target you should be looking at going forward is the new .net core stuff?
(I’m more a janitor than a mechanic, so my understanding of what framework is or isn’t dead this week is probably lacking, but I recall seeing an awful lot of chatter going on about that.)
Linux was the NFT or Blockchain or AI of 1999, so every tech company was jumping on board.
The sales pitch, as I remember, was that you could run your Wordperfect or CorelDraw shit on it, and not need to have Windows to use it and instead could join the future, which was Linux. Though, amusingly, their version of the future was running Windows binaries via Wine on Linux which, eh, okay but…
Of course, nobody used Wordperfect or CorelDraw at that point in history so I’m not entirely sure how that was supposed to sell you on buying not-Word and not-Photoshop.