I definitely agree that SRS can reasonably be thought of as a learning superpower. I very much regret that I didn't start using Anki until college.

To save my own kids from such a regret, I've created Boethius, a SRS web application for the classical liberal arts to augment our homeschool curriculum. It's now in public beta here: https://www.boethi.us/.

Let me know what you think!