At least give users the option to pick either 32bit or 64bit client. I'm sure many would happily drop 32bit games support for that. And people who want 32bit games pick the 32bit client.
https://github.com/ValveSoftware/steam-for-linux/issues/179#...
"Please provide a 64-bit Steam package, so that those of us on 64-bit distros don't have to install a gazillion 32-bit packages."