Steam bundles a lot of 32-bit libraries, but still requires at least 32-bit glibc, mesa, and libgl to be provided by the system among others. AFAIK this is for

Steam bundles a lot of 32-bit libraries, but still requires at least 32-bit glibc, mesa, and libgl to be provided by the system among others. AFAIK this is for ABI reasons, they wouldn't be able to ship these with Steam without also running 32-bit software in some sort of containerization runtime. I believe the compromise when Ubuntu dropped 32-bit support was that Canonical would still provide the 32-bit versions of specifically the packages required for Steam to work. I hope that Valve will work out a similar compromise with Red Hat. The problem Valve faces is that there's thousands of 32-bit Linux games on Steam, so dropping support for 32-bit means that users would see a lot of games they used to play stop working.