You are correct, they won't. Tesla focus right now is primarily on new customer acquisition. Once they run out of new customers to acquire, that is when they will notice, and only then will it become Elon's actual high priority, as it once was (when he needed to convince people to buy early adopter cars). It's the Silicon Valley startup approach, deal with the problem when it becomes urgent and not a minute earlier, as it wastes precious resources. As long as Tesla has drones of new customers lined up, existing customers are not worth spending many resources on, beyond keeping large legal liabilities away, and maybe any large media storms. Customer waves in the US may be slowing down already though, as evidenced recently by Tesla not having enough Model Y 5 seat configuration orders to fill even the initial production run. The question is whether Elon will decide that fixing service is worth investing in to keep USA customers, or will it be more more profitable to invest in new markets like China and let the US market dwindle.