I went from a Cube/Bosch powered emtb style touring bike to a eGravel. The bike I have now is the boardman ADV8.9e. Main reason I swapped was the Bosch bike was just shy of 30kg and just felt like a tank. Felt really crap on the climbs due to its upright geometry and it being a flat bar. Plus I only do gravel and light off road so it was overkill. The ADV is 16kg and much easier above above the 15mph cut off. Plus as it has drop bars/hoods, it eats hills.
There are trade offs though. The battery is 250wh, half the size of a full fat ebike. I can squeeze 40 miles out of it if I leave it on low power/100w. Spare battery is small light and can be carried easy enough but the Fazua batteries are not cheap! Plus as its a fully rigid bike, I am the suspension. I've had to learn better technique for when doing the few bits of rough stuff I do occasionally ride over.