I didn't think Recall was about answering questions - there was no LLM component - so much as it was about being able to search your history, based on a combination of SQLite FTS against OCRd text plus CLIP-style embeddings-based semantic search against the content of those images.
> Microsoft says Recall lets you find anything you've seen or done on your PC with a simple search query, and it's powered by state-of-the-art large language models, which can understand various content on your PC, like text, images, and videos. It works in any application, so you can search across your computer.