Yeah, this was way before steam deck. This was when SteamOS/Proton/SteamMachines were first rolled out.

If I remember correctly, the MS store was really young at that point. It was already an environment where people were nervous what the new store might mean. Then MS ballooned the idea into that environment and freaked everyone out. I believe they eventually moved forward with the idea on Windows for ARM for a time, but I have no idea if that stuck.