I really like that I can just drop a component onto a wire have it automatically connect it and trim the wire. Also, the automatic connection management was long overdue. And schematic wire management is greatly improved; you no longer get a ton of little segments, with potential connection (wires and pins one iota apart) issues, and they automatically recombine into single wires. This is basic functionality that you don't think of that mostly just works and when it doesn't it's just a pain in the rear. In v5 it's been a long time for me since ERC came up with anything disconnected, well, that wasn't an actual omission.