Depends what your average journeys are.
If you’re using a Prius to bumble around your local area on the usual short, slow, stop-start journeys then that’s when you optimise the benefits of the electric power.
For longer journeys at higher speeds where you’d not be using the electric motor a modern diesel will be far more efficient in terms of mpg.
Plus, what’s the life expectancy of the battery/cells used in a Prius?