I've gotten 8 so far years of light usage out of me Prius.It cost me 6k.I have no interest in getting overweight on debt.
But...if the next vehicle pays for itself (even partially) in fuel savings I will spend a bit more.
The alternative is another newer Prius which is probably 12k anyway that will use €2500 per year on juice.It does make financial sense to go electric as long as I don't write it off or buy a lemon.