They vary widely. Some have 1 mile (and the plug is therefore fairly pointless and usually just to qualify for some subsidy), whilst others do 200 miles and are effectively full EV's with a petrol generator to travel further.
It still allows regen braking down a hill or at traffic lights in town, so you get a decent efficiency gain. It also gives you a bit more horsepower when overtaking (depending on design). Or an hour of running the AC without belching smoke.
Considering the battery and motors for these tiny EV's is only 100 lbs or so, it is probably still worth having.
I would. Why wouldn't I? I park my car in an attached garage. If I had an EV or PHEV, I'd walk right past the charger on my way to the door into the house. I don't like standing around at the gas station waiting on the tank to fill. Seems like a no-brainer to me.
I actually wanted a PHEV, since my car is mostly used for local driving but I also drive hundreds of miles for work trips. Unfortunately I couldn't find one I liked.
The question isn't how long the journey is, it's how long until you're somewhere with a charger where you can wait a long time, but not too long. Short-range EVs make the most sense for people with single-family homes. Charging at work or apartments helps, but then there's the "too long" caveat.
Mine does about 40 miles during summer and 23 miles during winter. Given that my trips are within 25-35 miles range, I charge it daily. It’s at 9.5k miles and I filled up the tank about 7-8 times in 2 years. Rest was all electric.
