Steam could build for 64bit
Steam is doing that, though rather piecemeal. Both their client and runtime are moving towards 64-bit.
but it won’t help the gigantic amount of games that are 32bit also.
Doesn’t WINE’s WOW64 implementation solve this? Albeit with a non perfect compatibility.
because macos bo longer ships with the 32bit libraries needed.
I have no idea what the MacOS software landscape looks like, but if it uses WINE it might just be its silver bullet? If Steam does move towards 64-bit only, they would want to keep it compatible with Linux, due to their SteamOS ecosystem, and in turn MacOS users could also reap the benefits.





Ah. I understand now. I can see most distros dropping support for 32-bit libraries if this happens, my guess would be distro derivatives mantainers taking this burden instead. It’s not gonna be pretty for old or abandoned 32-bit linux builds.