>>2081398when i built my moped, i had a failure so severe the chain bound up in the case, locked the rear wheel, and brought me to an immediate stop from ~45kmh to 0, while on a defacto high speed road (a posted 60 zone, but one used extensively by heavy trucks because it is directly next to a port that specifically imports and exports vehicles and only vehicles)
the skid was bad enough that i looked at it immediately and thought "fug it it's nice i'll walk" and once i got it home a hole was worn not just through the tire but the tube had a good inch-wide hole in it. I am shocked that the rim didn't take any damage.
Another time I had bad sproket alignment and a similar chain induced destruction and lost 4 spokes instantly, with 3 or 4 more being severely bent. I took the quick link out and rode home under electric power at the hub.
This is who you share a road with, and if things were arranged a little better, such range and endurance and overall immediately available power wouldn't be required