Why have kick starters gone extinct?

[4 Paws_imp]

My Ural has a kick-start, use it some for the fun of it. Charging system on that Russian marvel of 18th century engineering quite robust. Weight considerations laughable too.
On these retro styled bikes the kick start does add a touch of panache.
There is a documented trick to starting a totally dead EFI system using a common 9 volt battery to power up the system, some simple jumpers and bump starting the dead bike.
Worth learning. Search Utube.