Cheaper cost and Toyota reliability. I already own a Prius and know it's very reliable. I am not crazy about having an internal combustion engine with a catalytic converter. The cat got stolen on my Prius last year it's sucks if you live in California. If there's no ICE there's not cat. But the Prime is cheaper than the ID4 and Model Y with AWD. The Rav4 is the most offroad capable of the bunch also in my opinion. I have a 1991 Toyota Previa minivan and a 2006 Toyota Prius and I'm trying to combine both vehicles. The Rav4 has more room than the Prius, same gas mileage, and it's a plugin hybrid. It has more towing capacity than the Pruis the Prius is not rated to tow anything. The Rav4 Prime also has boatloads more power than the Previa and Prius which is one thing I need when towing. 302 HP! The only downside to the Rav4 is it is larger than the prius but it's smaller than my van, so it's not an ideal camping vehicle.
Also I am trying to get a grant through California Clean Cars For All program in the bay area. They will give me $9500 grant if I trade in my Previa. Plus there is the tax credits, and California Rebate. So that's how I can afford it. The ID4 and Model Y I think cost too much to get the grant unfortunately.
Thing is though it's very hard to get a Prime right now, I just went to the Toyota dealer today and they had like 4 hybrids no primes. If you do find one it's is marked up a lot like $50k to $60k. That's ridiculous I would just get the Tesla then. So the ID4 is still an option if I can get it for the MSRP. The Tesla is out of the price range. Then there's the Ariya but I haven't seen it yet, suppose to come out later this year. One thing that puts me off about these all electric SUVs is that they don't have AWD standard and the Rav4 does. I really need the AWD because I go offroading/dirtbiking and I my van stuck sometimes. Plus the roads are so bad here, I drove the Rav4 Hybrid and man it was so comfy compared to the Prius. I'm so ready for an SUV. But yeah it's the Toyota reliability. I've heard a lot of problems with the Teslas. I watched a lot of Rich Rebuilds videos and it pretty much persuaded me not to go Tesla.
Another reason is I've got a solar garage project going on with it's main focus on charging my electric motorcycles, well only one electric motorcycle now. The battery on the Rav4 Prime isn't that big so I could probably charge it up with this system mostly. I think it's 18kwh pack. My battery bank is about 6kwh so I can mostly charge it if it's depleted and if it's not probably just enough to top it off. These BEVs have enormous batteries that would take days to charge at level 1. Plus if I run out of power I still have the ICE, I heard the Prime's range is like 600 miles when the battery and tank are full.