As with everything else, time and money. Most schools don't have the funds to replace their fleet of buses because of (the next big thing) and will have to do i

As with everything else, time and money. Most schools don't have the funds to replace their fleet of buses because of (the next big thing) and will have to do it as the old ones die off. Add to that the higher cost of electric vehicles and it doesn't look as immediately appealing.