Linux gaming marketshare is steadily rising and currently sits in 3.49% of Steam's monthly active users. Small number, right? [b]That's ~4.7 million users.[/b] Roughly 330x the 24 hour peak concurrency of Destiny 2 on PC. Sony executives would cream their pants if Marathon had 10% of those users buying and playing their game on the regular, but by blocking Proton support, they'll get zero of those players. Warframe, their biggest competitor to Destiny supports it just fine, thus I play Warframe. Arc Raiders, their biggest competitor to Marathon supports it just fine, thus I play Arc Raiders. That's just bad business. Bungie doesn't have the luxury of being selective on what operating system their PC users are using right now. They are conditioning an emerging market to ignore their games. That number is only going to grow and this is before SteamOS gets a proper desktop release, Steam Machines, Steam Frame and the inevitable Steam Deck 2. Keep in mind that this is all coming at a time when Microsoft is pushing AI slop code into their already broken, borderline unmaintainable Windows codebase. Windows exclusivity isn't the hill to die on. You can have a secure multiplayer game on Linux. Especially when the game's already server authoritative.