@deathcookies didn’t want to hijack the other thread. In general, I think I’m a pretty conservative rider and I know I don’t have a very large pool of experience relative to some of the riders on this forum but here are a few examples of how faster can be safer for my riding conditions. I’m sure others can provide their own experiences too.
This is the shared lane on my shortest commute route - the yellow arrow is actually the designated bike lane. The safest speed to go is at the same speed or faster than the vehicle traffic primarily because of buses - the buses can’t go faster than the flow of traffic which is around 20mph. Buses pull into the bike lane very often to drop off and pick-up passengers, they also don’t check the lane when they’re stopping. If you’re not going fast enough the bus will continually overtake you and then pull out in front of you to stop which is dangerous – if you’re sandwiched between the bus and the parked cars you run the risk of getting hit by someone opening their car doors or pedestrians or by the bus itself.
You need speed to pass bikers and to carry yourself over cracks. When you’re riding behind bikers it’s hard to see potholes ahead and bikers don’t have to dodge potholes which you have to on a e-skateboard which is why I don’t like riding behind bikers. I was behind a biker and there was vehicular traffic so didn’t see the above pothole until it was too late to brake and ended up just hitting the throttle hoping the momentum would carry me over it. I thought I was going to eat it but I didn’t … the board made it over with a very loud popping noise and it was shitty going over this but I made it. If I was going slower or tried to brake I know I would have gotten slammed.