Question about car charging on a small service.

So a lot of people have an older home with a small service (60A-120A) which typically means that you have to piggy-back onto an existing circuit, like your dryer or oven. So you buy something like a Dryer Buddy (Dryer Buddy Plus AUTO) or something similar to take care of the issue of tripping your breaker. But now your car doesn't charge if your dryer is on.

Question: Would anyone be interested in a device that regulates the car charging level so that it's always charging some amount, even if your appliance is on?

So if your dryer current draw is like 15A on a 30A circuit, your car can still charge the remaining 8-10A or so. You could hook up a current clamp to the dryer and talk to EVSE to regulate the power draw.
Thoughts?