In v8, I was using a tick-based event system - every ten milliseconds, I did a box search on every brick that was checking for vehicles touching it. This was quite slow sometimes when servers had a lot of these bricks.
Now, v9 used a trigger-based system - when X happens, do something - the only way bricks can detect players now is through the engine code. For whatever reason, Badspot did not include a check for vehicles in the same way, so it's nearly impossible to implement without laggy/hacky code.
