hey do you hate having a jumble of minecarts getting lost from each other? well i have a solution make a minecart connector place one of these connectors down between minecarts to make them connected. Like a train! now you can relax knowing you wont lose any minecarts
Also, due to unpowered rails acting like brakes, this isn't much of a problem anymore.
but they can backfire and go the other way
Not really.