Every quarter? Even when driving a 15 year old combustion car I have never had a car that needed to go for service that often! My new EV has a two-year service interval to check the coolant and brakes.
I generally do my oil every 7500 miles using full synthetic.
When I take it in for service I assume they don’t use the expensive stuff and chnage it at 5k miles.
Either way, that’s 2x a year for me. I’m probably below average driving at just shy of 15k miles/year. I think the average is around 15k though. That would be 2-3 oil changes if you did them at similar intervals.
Some companies (ie: BMW) mandate more frequent chnages and higher octane gas etc etc. I don’t use those cars. If I can’t service them myself I won’t buy it (Tesla included)