I'm firmly of the belief that to date the mad rush to EV's as produced more pollution through the higher carbon foot print to manufacture them than if we had done nothing. This situation won't be corrected until electricity ceases to be generated by fossil fuels and the EV's have done substantial miles. Some of them never will break even.
It's fascinating looking back on this thread that some earlier concerns are beginning to ring true. The rate of EV sales growth has stalled in the UK, Europe, USA and presumably other markets too. That's a bit of a coincidence. The car manufacturers are beginning to look quite sick, Volkswagen in particular is in financial trouble.
Someone made an interesting comparison with electric lighting. Governments banned incandescent light bulbs and sold us the dud of compact fluorescents which are toxic to dispose of. If they had held back just a few years we could have gone straight to LEDs.
We were also sold a dud with diesels and It will inevitably be the same with EV's . Current battery technology will soon be outdated to be replaced with solid state batteries or something else that's a vast improvement.
To answer the original question of this thread, I think my next car at least will be an IC and hopefully after that EV's will have reached the stage where they are genuinely a low carbon option.. As far as any concern that the value of an IC will tank in 2030, I think the opposite will happen, they will be in great demand unless the government interferes.