Last I heard the solid state is more likely to go in an upcoming
new upmarket saloon.
The existing batteries work fine so the car will be as it is - if it works for your purposes then it will do so for its life.
New cars are going to depreciate and a PCP deal still means paying for the depreciation on the car as far as I can tell.
Getting an ex-demo or pre-registered car with cash means the dealer will have taken the initial hit on the depreciation. Not many people can afford the upfront cost.
We found an ex-demo in our desired colour at a relatively local garage so it was an easy one for us. Though looking on Autotrader so
me dealers are advertised a brand new one for less than we paid for a used one! I see what you mean about the bargains out there. Hard to argue with those prices!