They haven't dropped net zero.
I think we should get the most life out of our petrol and diesel vehicles, rather than rushing to replace everything. We need time to continue to develop techniques, and work out where and how the raw materials for the change will come from, and how we can plan the most effective strategy, one that can be amended as we learn more. It costs a great deal of emissions and resources to replace the vehicles of an entire population.
We need to change our lifestyle - even not accepting a receipt in a shop saves a tiny amount in electricity, the special paper, and the spark/heat printer that prints a piece of paper that will just get screwed up in a handbag.
My local Sainsbury's prefers you to buy loose rolls and doughnuts and croissants in a paper bag. No need to take a new one each time. Just keep using the old one to put your rolls etc in, until it wears out.
The other method is to try and pretend our current lifestyles can continue unchanged in a massive existential crisis, for example we will need to abandon the idea that every adult in a household should own a car as a matter of course, We will need to get used to walking in the rain, not jumping in the car.
I don't hold out much hope for the second method.