I played WoW hardcore on Linux during Vanilla, off and on since. But blizzard always said they, unofficially support Linux. To their credit, Battle.Net and WoW always installed without any major issues or special tinkering required. Pretty much my only game, for a long long time, for that reason. Have to agree with you though, at least these days. Linux Gaming numbers have to be closing in on Blizzard official support levels. Tim Sweeney said, 15 million Linux gamers before we could expect a Linux official launcher from them. I imagine Blizzard is in the same boat in that regard. And Youtubers seem to speculate, between 5 and 10 million monthly active users. So, we have to be close.