I’m OP. Thank you for the feedback! I don't see why not comparing "SRS over no repetition at all". To me, SRS or no SRS, they are all learning/studying methods.

All SRS algorithm is expanding, i.e. increasing intervals. So maybe with continue success, it'll be: 1 day, 2, 4, 16, 40, 300 (arbitrary numbers).

How do you propose to lean medical texts, if without SRS?

Mnemonic techniques only work with rote recall, whereas flashcards, if formulated well, can help induction, understanding, not just recall.