Range extenders probably aren't what you expect - You still have to charge.
For example the bmw i3 range extender won't let you drive on gas. It will put charge in the battery while you are driving or stopped, but it won't generate nearly enough power to keep up with freeway driving.
Other hybrids are basically ICE cars that can capture a little power and feed it back.
and hybrids have twice the complexity - all of ICE + all of EV.
The complexity is the killer for me. I think with the advances in efficient (>90%) propane synthesis and direct fuel cells, we will see some fuel cell hybrids to give the fuel cells time to warm up. But even then, the extra complexity is very high.
Range extenders probably aren't what you expect - You still have to charge.
For example the bmw i3 range extender won't let you drive on gas. It will put charge in the battery while you are driving or stopped, but it won't generate nearly enough power to keep up with freeway driving.
Other hybrids are basically ICE cars that can capture a little power and feed it back.
and hybrids have twice the complexity - all of ICE + all of EV.