I've seen only one small kid on an e-bike and they were with a parent. Unsupervised children on e-bikes is less about the bikes and more about parenting. There are a lot more bikes around now that many are e-assist. Most are not going fast. It's been a Bike Forums thing to inflate the speed profiles of EVERYTHING for decades. Long before e-bikes y'all were inflating your own speeds on your 'acoustic bikes. You also inflate the speeds that crazy cagers use while blasting through residential neighborhoods. What I wonder is how long it will take till the e-bike hysteria dies down and acceptance takes place.