Respectfully, when you’re responding to someone who doesn't know what RL is, and you say “it’s this—already used in [another even lesser known acronym that includes the original]…” it doesn’t really help asker (like if you know what RLHF is then you know what RL is). I’ll admit I knew what RL was already but I don’t know what RLHF is and the comment just confuses me.
What is RLHF?