I appreciate everyones input. However, with everything else being the same, i.e, diet, time in the saddle, etc, my anecdotal experience is the ebike simply cannot burn the calories that pedaling an anolog would. I think we can all agree that calories burned per hour on a ebike cannot match that of an anlaog. I would have to change one of the existing factors like more time in the saddle, improving my diet, and/or decreasing the assist. . I was just surprised how much of a difference it made in a relatively short time. Im just as surprised that no one else gained weight switching to an eeb.
Additional time in the saddle isnt an option as Im maxed out on time available to ride (about 8 hrs a week). So, the diet definitely needs to change along with decreasing the assist. I also plan to take the analog out more often.
The rain here in socal isnt helping anything! Enjoy your weekend all!
Father of 11 year old boy/girl twins here!
I had the same experience. I was hovering around 150lbs, in excellent shape, riding an enduro MTB 4-5 times a week, often 3-4k' elevation per ride. I could eat/drink whatever I wanted at that point and it wouldn't affect my weight. In 2020 I picked up a Levo SL (thinking I'd still get some exercise with the SL platform) and immediately started gaining weight.
Same as you, I had every intention of keeping it in eco but rather quickly gave in to full turbo all the time, unless I was trying to save battery. My rides stayed around 3-4k' elevation. I gained 10lbs in a handful of months and haven't been motivated to burn it off or eat less. I've never needed to watch my diet in the past so that's something new to me. I recently purchased a full fat Levo (very happy with it) and I'm not even trying to pedal this thing anymore

Definitely less beer and chips in my future.
My guess is that the people who lose weight when they get the ebike are losing it because they're riding more than they used to, for longer, etc. That's not the case for me, I'm just burning a fraction of the calories and not getting my heart rate above 150 unless it's a gnarly descent.
So sure, diet is the place to start, but I guarantee I'd burn those (now 15) lbs pretty quickly if I went back to the regular bike and stopped riding the E.
You seem like a cool dude, the aggressive tone of some of the comments here are head scratching for sure. Maybe some have had a struggle with weight in the past and that makes them sensitive? Maybe I'm just lazy but I'm still relatively slim, fit and enjoying riding bikes more than ever