I still wish literally any conference would let me propose a "composite" talk in the CFP tool, wherein I submit four lightning talks — not all to be done consecutively, mind you — rather than a single full-length one.

The most interesting stuff I tackle just fits better into five minutes. And most full-session conference talks really only have five minutes' worth of content in them anyway.

Most conferences need to lean harder into lightning talks anyway: more participation, less fatigue, etc.