This is only true if you're purchasing used. Anyone in the market for a NEW car absolutely can and should be considering an EV.

Also, you would be fucking shocked how expensive an oil change can be on some cars, even when doing it yourself.

Yeah most* engines can fairly easily do 7500mi changes on good synthetic. Even my 30 year old Honda expects 7500mi changes from the factory.

*I say "most" because a lot of modern direct injected turbocharged engines (designed for efficiency) have issues with fuel washdown due to DI cold starts and high turbo bearing heat cooking the oil to death. Those actually do need 5000mi oil changes typically, especially since 0w20 and 0w16 has real low film strength to start with.

To be sure of any OCI do an oil analysis from a lab like Blackstone at the end of your extended interval to make sure it's still in acceptable shape.

You can find what the manufacturer recommends for your make and model in your owners manual or you can look it up online. It's never 3k miles and is almost always something like 6-8k miles, with increased frequency as the vehicle ages. Older vehicles frequently burn more oil so you might want to check your levels more often if you use one as a daily driver.

true 6-8000 is completely fine

(disclaimer i have no idea what imtalking abouy