Ho Hum. When I ordered my EX in september 2021 I know from cashless payment records that 4 pints of milk cost £1.15 at my local tesco express. Today its £1.55. So I knew that a new Jazz wasnt going to be cheap.
Using the Bank of england inflation calculator to extrapolate what I paid in 2021 to todays prices the same spec Jazz should be about £27K
https://www.bankofengland.co.uk/monetary-policy/inflation/inflation-calculatorIn fact it was on offer for a bit over £27k,inc 5 years servicing but excluding metallic paint . A lot of money for a small car. Trade- in valuation was about 70% of the new price in 2021 , which is good. But cost to change was still going to be about £12k which is a lot of money to find in one lump sum. Especially for what is basically a newer example of what you already have. But I'd probably have paid more than this in 37 'easy' monthly payments for a leasing deal, and its a lower percentage increase than the price of milk.

I've looked at alternatives. Keeping the car longer , or running reasonably new second hand cars can make a lot of financial sense. As long as no big repair bills come along for complex machinery. And it would cost a lot to ever go back to running a new car. I could go down market on specification or brand. But would still face depreciation costs. I could buy Chinese, but at what cost geopolitically. Some alternatives are bigger on the outside than the Jazz, but not much bigger inside. You get more car for your buck but there are still a lot of bucks in the pot to lose and possibly higher running costs for a bigger car than I need.
In the end I decided to order a new Jazz advance. My jazz has been 100% fault free, with none of the problems with seats, aircon condensers, 12v battery, folding mirrors or brake simulator. It suits me perfectly,and I'd like to continue running cars less than 3 years old. Alternatives would still involve anguish over large sums of money. And I already have an extra set of wheels on winter legal tyres I can fit for for continental trips and snow chains of the right size. (Austria has already had snow at low altitude)
I think I got a good deal on price and a servicing package. I wont quote exact figures as some might be annoyed they have paid more .Or know of better deals and think me an idiot. I hope I dont regret it.