The downside to a hybrid is it has 2 drive trains
It has a gas power train and an electric power train in one. It adds complexities and gives more things to break. But Toyota, Honda, Hyundai, Kia seem to solve those reliability things. And plug-ins are only worth the money if people actually plug them in and night so they can be used in electric mode. If they're not plugged in, and solely run in normal hybrid mode, then they do get worse MPPG than a non-plug-in hybrid of the saame brand (Prius versus Prius Prime) due to the higher weight of the battery pack and bigger motor weight.
I had an 18 Honda Accord hybrid that I could routinely get almost 60 MPG in. But it was getting up there in mileage (100K) and was going to need some expensive preventive maintenance so I traded in for full electric (Kia EV6). It's very nice car with about 300 mile range. I charge every night at home and have taken road trips to SoCal from Vegas with no issues. It costs me only 4 cents per mile for electricity at home when using grid power or zero cents per mile when my solar covers it (compared to the 8-10 cents per mile for my Accord Hybrid). I've been stuck in road closures twice, once due to snow and once due to bad crash, where I had to sit for more than an hour. With heat/AC, lights, and radio on, I'd only burned 1% of my battery, much less than I would have burned fuel in my hybrid for the same stop time.
Full battery electric is the way to go for simple, low maintenance, reliable transportation assuming you have the ability to charge daily at home or live in a modern area that supports the environment and EVs. If not, then a hybrid makes sense for fuel saving.