Skateboards are a competitor. They are pretty common as a last mile choice in california, and I see even older people riding them on occasion (I assume they've been on a board for 50 years by now). They are better than the scooter on the train. Most people I see with electric scooters on the train don't bother folding it up or they buy these huge ones that I'm not sure even can, so you have this big 4 foot long obstruction that you might not see until you rack your ankle into it. My skateboard on the other hand, I just stick in between my legs if its tight on the train, and throw it under a desk at work. Sure, there's a learning curve with skateboards, but I'm sure these have one too.