Quoting: Phlebiac1) Steam Deck usage has stayed relatively flat - or more accurately, has scaled at the same rate as total Steam usage.

In particular, the proportion is staying flat at around the same level as total Linux was for years, but the release of that high profile Linux gaming demonstration device has changed the conversation; which has led to game devs paying much more attention to that device than they did to the rest of us before, and to the subsequent growth of desktop Linux.

Quoting: Phlebiac2) macOS usage declined for years, but in recent times it has scaled at nearly the same rate as desktop Linux. I wonder what factors are involved with that; I don't think Valve has done anything major on that front, and to my knowledge Apple hasn't done anything to improve things for gaming (they are actively hostile to it in some ways).

I expect that growth is from people leaving Windows 10. If Microsoft are going to make you buy a new machine anyway, do you really want that machine to be a Windows machine? For a chunk of people it seems that the answer is "no." Especially with how well-regarded Apple's Arm chips have been - I think the bump before the decline in Mac share was from the sentiment around the M1 chip.

I'm pleased that Mac is growing again. The bigger the non-Windows market, the more incentive there is for game devs to avoid single-platform tooling. Although it is a shame that Apple makes it hard to use one solution (like Vulkan, say) for all platforms. Apple having Vulkan on Macs and Sony having Vulkan on the PS6 would make multiplatform game dev much more straightforward.