It's a good example, and something I often wonder about when I'm filling out a survey and give up part-way -- did they save the questions I had already answered

It's a good example, and something I often wonder about when I'm filling out a survey and give up part-way -- did they save the questions I had already answered? FWIW you probably wouldn't need something as powerful or blunt as session recording to pull this off, though. You'd only need to listen for keystrokes on the relevant input (with document.addEventListener or similar), and send them to the server as they're typed. Same with partially-filled surveys. IIRC Facebook got in some heat a while ago for sending the partially-typed messages up to the server and to the other chat participant.