this post was submitted on 27 Aug 2023
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I guess one question is: why is it still 32-bit? Feels like something Valve should be updating now.
I'd wonder if it is too maintain compatibility with 32-bit titles?
TL;DR is that wine doesn't yet support WoW64 (Windows on Windows64), which enables the running of 32-bit binaries on a 64-bit system - it's conceptually similar to multilib on Linux. You can't run 32-bit Windows bins on a purely 64-bit WINE as I understand it.
But the Steam launcher doesn't run on Wine. Some games may run on Proton but one shouldn't depend on the other AFAIK?
well, Wine does support WoW64, but the way it's implemented requires you to install both 32 and 64 bit Wine.
yes, many games have 32-bit builds (though maybe Valve can just use 32-bit Steam Runtime to preserve compatibility)