Models plus your data plus good design. That's the whole formula. There's no proprietary breakthrough — the breakthrough is that someone bothered to build it around the specific shape of your work.
Month one, the AI is decent. It writes drafts that sound mostly like you. Students get useful but slightly off-key answers. Forms get sorted, sometimes wrongly.
Month six, it's uncanny. The drafts barely need editing. Students reply with "thank you" not knowing it wasn't you. Forms come pre-sorted with notes you'd have written yourself.
Month eighteen, it's irreplaceable. Years of your teaching folded into a model that nobody else can replicate — because nobody else has your training data.
That's why I build for the long term. The AI gets useful slowly, and then suddenly very useful. The compounding starts on day one.