In the UK
It was doomed from the start. It was illegal to use them on the roads and also illegal to use them on the pavements. The only place you could legally use them, was on privately owned land. I suspect that if the bicycle was invented now, it would suffer the same fate.
By the way, so are electric scooters, illegal that is, but that doesn't seem to be stopping them. For some reason, the law isn't being enforced. In fact I believe there is a review into making them legal on roads in some places/circumstances. It seems the transport revolution came too late for the Segway.