Steam cuts the cord for legacy Windows and macOS
Briefly

The November 2024 Steam update drops support for older OS versions while bringing enhancements for users on current Windows, Linux, and macOS platforms, including improved game recording.
With the introduction of Scout, Valve has transitioned native Linux games to a more robust environment. This shift from the legacy client enhances compatibility and performance on SteamOS and various Linux distributions.
Read at Theregister
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