In one of my ride group, all suffering bikers switched to an e-bike, the average speed of the group increased dramatically, and we have more fun riding together now.
Still not for me though... but it is definitely a good option for people who do not spend/have enough time to train, but have a good technique.
From my experience. The disasters come from people who don't have the skills to properly ride an MTB.
The extra watts are dangerous for them, but also for the people around.