Yes, please. I just asked about it in this thread:
https://forum.cockos.com/showthread....80#post1961380
REAPER keeps track of used FX.
I would like if it kept track of used Actions too.
But, flagging favorites is much better. Because, you might use some actions to try them out and decide that their function wasn't what you wanted. Being able to sort by favorites is better. Being able to see a list of all used action history would make it a lot easier to find previously used actions that you desire to flag as a favorite!
@FoxAsteria AFAIK, the list of recent actions is session-specific. It doesn't appear to retain after closing REAPER and opening a new session.