ICE prices may drop, but not hugely, most can’t afford a new or even used electric car. The fuel hikes will kill diesel off 1st I guess.
Why do you think this, given the obvious fuel efficiency benefits of diesel? (It's the whole point of diesel).
I've personally been very surprised at how quickly people were happy to move to often considerably more inefficient petrol versions of cars such as SUVs. We're buying less efficient cars than we used to just at the point at which fuel hits record prices.