There's a chance that NEW SALES of just PASSENGER VEHICLES could hit 50% by 2025.  But that would still only mean a pretty small percentage of vehicles on the road.  For two reasons... (1) As I already said, most motor vehicles  of this era tend to last a good 10-15 years.  The overwhelming majority sold today are ICE, and surely will be for at least another 5 years.  Most 2018 models will still be on the road by 2030; the 2023's until 2035, etc.

And (2), passenger vehicle are only maybe half of the vehicles on the road. Delivery vehicles, specialized vehicles, larger vehicles, construction vehicles, etc. make up the other half, and few of those are likely to be EVs.