Ted...
I was an active gravel e-cyclist with my Vado and Vado SL, and I was even a club member. I could complete a 263 km gravel ultramarathon where I alternately rode the heavy Vado and the lightweight Vado SL (for the battery plan considerations). What we ride as "gravel" in Poland is a mix of asphalt, bad quality gravel and mild offroad (including sand). There was a time when I could complete a 104 km "gravel" group ride at a racing speed on my Vado 6.0!
Then...
I was riding my big Vado fast on a forest fire-road. The rear wheel slipped in the puddle and I crashed at the full speed. It did not cure me from my passion yet.
During the gravel ultramarathon, I tried to negotiate a speed bump on my Vado SL and unfortunately crashed at high speed onto the pavement, strongly hitting my helmeted head against the asphalt. I got a mild concussion. After sitting for 30 minutes on a bench accompanied by my "Guardian Angel" brother and two witnesses, I decided to continue the race, and have completed it.
Since...
Whenever I ride onto anything more rough than asphalt, I get the trauma revisiting me. I ride very slowly there, and am afraid. Nothing wrong about any e-bike, especially about the Vado SL that I made a gravel-worthy steed. It is the trauma.