Update: I sent my medical exam (I-693) RFE on 02/24 to USCIS. 03/10 - my case was updated and indicated it was received. 03/11 - case was approved!
I got the NOA in the mail today. Just waiting to receive the physical green card now.
Total time was about 4 months from submission to approval. Safe to say I'm pleasantly surprised by how quickly this all went for me. Hoping everyone else gets good news sooner than later. My friend's husband submitted his AOS a while back and it got approved last month, 14 months later. However, his interview was waived.