The lecture seems to be the more off-putting bit from what I've seen folks complain about. Having to signal before doing work is probably not great either, but

The lecture seems to be the more off-putting bit from what I've seen folks complain about. Having to signal before doing work is probably not great either, but that is kind of how American society works these days. That said, both the signaling and lecture don't derive from the machine - they're manifestations of the authors.