Except an old and inefficient engine will be absolutely awful for the planet and local air. To a point, though, I have to agree. There’s little sense scrapping a 3 year old petrol for an EV, it’s hard to justify at 8 or 9 years old but by the time you get to 15 and the engine is getting a bit ‘Trigger’s broom’ and somewhat inefficient, the justification is much, much easier.
I’m not disagreeing, but its worth remembering the amount of pollution and carbon foot print to manufacture an EV is far higher. The break even point for an EV is roughly 30,000 miles, for any gains over an ICE car.