tl;dr; would love to see this feature, it would make sqlite, personally, go from 'meh, easier to just use json/xml files' to a critical tool in the toolbox. So much this, every few years I come and check on SQLite to see if it has the returning clause yet, it never does =(. I'd even be willing to toss money into the pot to support its development, but currently only see 1 way to fund development and that is the 85k/year business subscription....