GV27:$5K is a lot to pay for a car that can only go 70km. You'd basically need a second car to make that work as you state - so you're not realistically going to be cashing in a clunker unless you've already got two cars now.
Hopefully battery swaps pick up as the EVs Enhanced and other options come onto the market and this becomes a more affordable upgrade path.
It's still a fair bit but for most people 70km would be enough for general daily use. Especially if you are a two car house you can use the leaf as your main car for all running about. For those with lower incomes the savings on petrol could make a big difference to their daily lives.
The other hope tmwith the 16 blade battery is EVs enhanced should start to see lots of old batteries coming out to replace with 16 blades. This should reduce the price of that stock meaning somewhere down the line upgrading to a better 24kw or a 30kw could be an option to reinvigorate the car.