Less Miles on Charge

good question, that's a big drop.
before deciding, review all the external factors that can affect range. most people aren't losing more than 10% or so.
another good test is battery capacity. you can measure total kwh to fill from empty using a meter that goes between the evse and wall outlet, or use a public charger that gives you a readout.

 

Too many unknown variables and factors.
How much does a new plugin cost?

 

about $36,000. if you can find one

 

What do you think made the cars EV range tank from 40 miles when new to 23 miles now that you've put 90K miles on the car?
Have you thought at all about what you think would have been a fair price to pay for your 2020 Prime when you got it?

 

I'm happy with my 2021 Prime purchase. I was actually looking at a Corolla hybrid to replace my Prius C. Once I factored in the Federal, state, utility & dealership rebates - it was the same price as the Corolla hybrid. Standard hybrids had lost all their incentives at the time, except for using commuter/high occupancy lanes.
FWIW: my guess-o-meter has only gone up to 28 miles on a charge and I've caught it fibbing to me on multiple occasions. I average around 3.5 - 4.0 miles/Kwh. On several occasions it has registered 25+ miles/Kwh, coming back from 8K feet elevation drop. While I turn the car off and on throughout the day, the table reads as a daily average. I could believe the 25 miles/Kwh on the trip back, but what about going up the mountain earlier that day?
Bottom line is that those numbers are just guesses. I place more emphasis on miles per fill-up and miles per gallon calculated at fill-up to determine if there's something wrong with the car. Besides, Toyota stated 25 miles per charge, so I don't see the complaint. That average is gonna go down in the cold, wet, humid, winter conditions, and up in the dry spring/summer months.

Just my 2 cents......

 

Did you actually go 40 miles on a charge, or is that what the gauge displayed?