Pretty sure it's Linux not being the default option
From there, popularity outside the organization is irrelevant, internal support and userbase is for and on some version of Linux.
As this would spread, we would eventually see global usage increase and global popularity become a non-issue.
Wine and Proton should have levelled the playing field. But they haven't. Also, if you've only just started using Linux, I recommend you wait a few years before forming an opinion.