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A point I have made to many people but which generally results in blank stares is that for the foreseeable future we're going to have a mix of technologies.

That is the big trend underway in energy and it's already well established.

Not so long ago, depending on where you lived, all electricity came from either coal, oil or hydro with it being fairly uncommon to find more than one major source within any grid. The only places where that is true today are a few remote towns relying on diesel.

As recently as 20 years ago practically all cars, utes and small vans in Australia had petrol engines. Today diesel dominate for utes and is widely used for cars and vans.

The only energy interconnections between states in 1989 were NSW and SA for gas and NSW and Vic for electricity. That was it. Today we have all state except WA interconnected with gas and we have all except WA and NT interconnected for electricity.

Solar is now a significant energy source but was close to zero just a decade ago.

So there's a definite trend toward diversity and in the context of vehicles we're likely to see that continue to increase.

Yes we will have EV's.

Yes petrol and diesel will both still be around for quite some time yet. Not forever but they're not finished yet that's for sure.

Natural gas will probably play a bigger role too, especially for heavy vehicles.

The biggest mistake anyone can make in all of this is to assume that it's an all or nothing proposition. Either all EV's or no EV's. All renewable electricity or all from coal and gas. Etc.

In reality there's going to be a mix of technologies for the next few decades that's pretty much certain.