Are you confused on why there's many different versions of Valve's Proton? The compatibility layer that runs Windows games on Linux / SteamOS and Steam Deck. Here's a little guide on what it all means.
Just saying, from a user perspective it’s not what people are used to, they don’t keep multiple copies of the same software installed in case an update breaks something and they expect that if something breaks the fix will come in an update, not that they’ll fix the issue by forcing the use of a previous version of the software they don’t even realize it’s still available to them.
When you change things you might fix some issues but you might also simultaneously create others.
Just saying, from a user perspective it’s not what people are used to, they don’t keep multiple copies of the same software installed in case an update breaks something and they expect that if something breaks the fix will come in an update, not that they’ll fix the issue by forcing the use of a previous version of the software they don’t even realize it’s still available to them.