Maybe due to the fact they act like one? My 2025 Sienna sounds like my 2015 Altima did getting up to speed, though more solid and no rubberbanding going on. I thought the 2015 Altima was like driving a snowmobile. Rev it and go until you get to the speed you want, then settle the throttle down. The e-CVT doesn't quite run like that, but isn't far off.e-CVT is not a belt driven conventional CVT. I don't even know why they call them a CVT