Hybrids make a lot of sense, they just have a lot of the same costs as building EVs and most buyers in the US weren't willing to pay an extra $5k to increase gas mileage by 15%.
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.
>"Hybrids make a lot of sense, they just have a lot of the same costs as building EVs and most buyers in the US weren't willing to pay an extra $5k to increase gas mileage by 15%"
It's more-so the "I don't want that over-complicated crap" mentality, which is hilariously out of date.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.
That's a factor, but as you say many hybrids are actually very reliable and actually simplify many parts of the drivetrain over a conventional ICE.
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.
> The first-gen Prius ...
...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.