Sharing is a good way on mobile already h nonetheless I could imagine that being able to import your knowledge base from another service could give you a "headstart" and brings up the unique advantages Recall offers very fast. In my case I do have a hell lot of stores articles (~ 20,000 stored in raindrop - only occasionally working on them cause summarizing / taking notes and doing a bit of reorganizing then ears up a lot of time and is cumbersome, plus some links in fabric and a link list in my notes app).

Doesn't have to be a full blown import assistant for all common apps - I think supporting csv nodding a list of links in txt and html will work great already