I have some experience with these and 40km/h (just under 25mph) is roughly half what some will do [0][1] and with full-suspension you wouldn't necessary be catapulted with a small bump.
But when going above bicycle speeds, I do tend to wear increased safety gear. My biggest concern is always being t-boned by a car.
[0] https://varlascooter.com/products/varla-eagle-one-dual-motor...
[1] https://fluidfreeride.com/pages/nami-burn-e
