Go to Toyota's website today and you'll see that a Rav4 Plug-in Hybrid is more expensive than the bZ which is the equivalent full EV.
Going to an EREV layout (a series plug-in hybrid where the gas engine cannot drive the wheels mechanically) doesn't really save any costs directly, but allows sharing the platform between EV and EREV models.
I have a Sienna minivan that is hybrid and gets 36 MPG which is at least 10MPG more than everyone else using a beefed up version of the drivetrain the Prius created. (I can go 550-600 miles on a tank)
I also got RAV4 Prime which is a plugin electric that uses the same drivetrain tech and can go full electric, hybrid, or full power with both for over 300hp which is fun.
They achieve the best efficiency by using an Atkinson cycle engine which is more efficient but less powerful on the Sienna and Prius. What has confused me more is that things like the Grand Highlander still have a traditional cycle engine in their hybrid setup so you don't get the maximum advantage.
It would be very interesting to me to have a small sedan BEV with a rear charging port and an optional flat trailer with a large battery and room for luggage/furniture. The battery would be plugged into that car while driving. I'd want the trailer rentable from the dealer for occasional long trips. BEVs seem to have powerful motors, there must be something else with the economics why this isn't a thing.
RVs are where I would think this would make the most sense. People with a travel trailer already have a heavy trailer and they want a lot of battery to get it anyway. beef up the axle a little you can put a thousand pounds of battery on you get more range when you're towing and if there's any left over your RV can run on battery power. It's also very common for them to plug in once they get where they're going and so they can charge on 220 volt power that's already at the RV park and be charged and charge your car while you're at it overnight.
https://electrek.co/2026/03/26/lightship-electric-rv-trailer...
https://electrek.co/2025/06/30/pebble-begins-deliveries-elec...
https://electrek.co/2026/05/08/really-quick-charge-with-rang...
How is that different than plug-in hybrids that toyota already have?
In parallel hybrids, both the gas motor and the electric motor provide traction, sometimes simultaneously.
Parallel is more efficient if you're depending on gas often, as every conversion has losses. Toyota mostly sells hybrids you can't plug in, and the ones you can plug in are variants of the ones you can't, so they all share the same drivetrain.
Related, though not for plug-in hybrids: https://www.youtube.com/watch?v=KnUFH5GX_fI
Toyota is currently seeing record sales of their hybrid models and has made multiple models hybrid-only as costs have fallen.
Plug-in hybrids with larger battery packs are a harder market fit. They cost more because of the larger battery (often more than full EV equivalents) and are not saving you any extra money unless you can plug it in daily. If you have that extra money to spend and a place to plug an, an EV will probably work fine for you and save you more money over time.
It's more-so the "I don't want that over-complicated crap" mentality, which is hilariously out of date. The first-gen Prius ended up being the single most reliable car ever made by almost any metric you can name.
Cost is a huge factor, and now that hybrids are a small cost increase, or even the default option on some models, sales have increased substantially. Basically half the cars that Toyota sells are hybrid or EV at this point.
...was also incredibly slow.
A pitiful 70 horsepower motor assisted by a 44 horsepower motor that combined to an anemic 104 horsepower [0] on a car that weighed ~2,800 lbs.
I had to borrow my in-laws' car once, which is a first gen Prius, and I found the extremely sluggish performance to be outright frustrating. I felt like I had to floor the accelerator to reach highway speeds in any reasonable amount of time.
[0] Not a typo. The numbers don't add to 114 because they can't both deliver peak power at the same time.
"You have to have a specific daily drive for them to make much sense" - You'd have to have an extremely specific commute for an ICE car to potentially beat a hybrid (flat highway driving with zero traffic). Even then it's doubtful as hybrid engines can be designed to optimize more for efficiency since the electric torque can augment to make performance acceptable. Try to find an ICE car that gets better EPA ratings than equivalent hybrids.
"You're carrying two engines and to fuel/power sources, so mileage is terrible on gas and battery." - The corolla hybrid LE weighs 100lbs less than the ICE LE, in part because hybrid transmissions are quite simple in comparison to a manual/automatic required in an ICE car. In either case, hybrids have a huge advantage in the types of driving where weight matters (stop-and-go/hills) because they can reclaim that energy rather than losing it as heat.