Current plan and steps to remove proxies in Blender.
== Blender 3.0 ==
[x] Remove any user-exposed tool allowing to create proxies (rB59387aabe805).
[x] Auto-convert proxies to library overrides in existing files on load.
NOTE: During Alpha phase of Blender 3.0, it remains possible to keep existing proxies, by disabling an experimental user preference option, `Proxy to Override Auto Conversion`. (rBcdcdd2c479b5, Whether this option will be kept for 3.0 release or not is not decided yetrB501b0190d679).
== Blender 3.1 ==
[] Remove all internal proxy management and evaluation code, deprecate related DNA data.