DEVONthink gives me a leg up with the Pocket flow because it has a built in option to automatically create PDF versions of articles in an RSS feed. Other than that, I don't really take enough advantage of its power user features. If I were to start over today, I'd probably take a serious look at Keep It which seems like a lighter tool. It's really its full text index and some of the incidental metadata features (like having the source URL for anything exported from a browser) that keep me using it.

The papers I stash there usually come to me as PDFs. When I need to scan a physical paper I usually use Scanner Pro from my phone and export to DEVONthink from there. It has built-in OCR that's always been good enough for searchability.