A lack of laziness I suppose. I've been using it on and off over the years and have Mint in dual boot right now in preperation for a post-win10 migration, but I'm constantly running into various small/large issues. In the past few years I've had issues with wifi drivers, with gpu drivers (f u again nvidia), issues with sleep mode and battery drain, issues with finding equivalent os management tools ( totalcmd, task manager, treeview etc ), issues with "alternative source" games etc. I've also had issues wrapping my head around bottles and wine prefixes ( but I will admit wine is an excellent piece of software and has come a looong way since the mid 00s ).

Linux is great if you're a tinkerer because you will need to tinker with it at some point or another. But as I get older I just can't be arsed most of the time.