As with all 'run-out' models, they will get cheaper and have more kit fitted, making them more affordable to those that don't usually buy new cars... there are a lot of cars on the roads produced fifteen years ago, there's no reason to think that production methods will change enough to reduce the usable lifespan of cars, so theres every likelyhood of petrol & diesel vehicles still being around in numbers to at least 2050. There's also no mention of trucks (heavy plant and other specialist vehicles will still need to be fossil-fuelled), buses, maybe even rural ones, are a great usage case for full EV, in Nottingham there are full EV taxis with induction charging in some taxi ranks. I can see increasing emissions regs and taxation 'incentivising' manufacturers to move to EV only production sooner than 2035, it does need some form of 'carrot' (such a heavy subsidies) to get the traditional second or third hand car buyer to move to EV's. The biggest hurdle is range anxiety, my own vehicle can go up to five hundred miles on a full tank, loaded with up to 1100kg, the current best equivilent can only manage one hundred and fifty miles with the same payload, so with say 10% of range spend diverting to a 'fast' charging station, time spent charging, that's a fair bit of time and 'fuel' overhead for a ~six hundred and thirty mile journey that i'm currently doing up to four times a week...