Fedora Workstation has been really good in my experience. The available software is shockingly up to date and I haven't run into much breakage of any kind in the year or so I've been using it across 2 systems (despite my best efforts every few months when the urge to tinker hits me). I do occasionally run into issues caused by the default SELinux policies, but they're not especially difficult to work around if you're comfortable using the terminal.
I do share your sentiment about the AUR - I definitely miss it at times. That said, Flatpaks and the fact that pre-built RPMs are so commonplace have both softened the blow a lot.
That .01% number is out of line with the overall share of Steam users in 2018 by literally an order of magnitude. I can understand some deviation within a particular game, but that figure is so far off that I kind of suspect he just made it up on the spot.