Government globally have made the decision to go green and phase out fossil fuel use by 2050/2060 and as such be carbon neutral by then. That decision has been already made even though some Populists will want to renege for short term political gains (eg Trump)
In that context the trend has been set with governments (particuluarly OECD countries) having available stick and carrot to accomplish their 2050-60 Carbon neutral targets.
Overseas that has happened already. Take the EC for example; (the biggest global market in $s), its using carrot and stick to gently encourage consumers to go EV, those measures include EV subsidies/tax breaks, higher petrol and diesel pricing and much higher rego charges based on CO2 emissions.
As from Jan 1st this year Aus has embarked on that path by compelling new car importers to reduce fuel consumption over its total model mix wth EV concessions in Rego and tax breaks. As we get closer to 2035 these measures will exponentially rise.
So while depreciation can be high for a mum/dad motorist going EV (ie low ks) the depreciation of fuel guzzlers will rapidly increase, IMO, as we adopt European style measures.
For example in Ireland a 6 year old Toyota Yaris Hybrid is worth more than a 6 year old Mercedes Benz C200 ICE and when bought new the Benz was worth 2.5 times the price of the Yaris Hybrid!
So the bottom line here is, what happens in Europe happens here later in Aus like our ADRs which are basically a cut/paste of the English version of EC standards (eg..our latest major ADR ...ANCAP...is a cut/paste of the Pommy NCAP with a slight variant for commercial reasons. )