I used to watch his content a couple of years ago and I remember him saying multiple times that he reaches his goal if he goes out of buisness. Devices being so easy to repair, that his services are no longer needed would be a reason he'll gladly accpect as a failure of his buisness. I haven't watched him in a while so I'm not sure whether he still holds that opinion. But given that the laptops, phones and harddrives waiting for repair where literary piling up in his workshop, it's more likely that his shop burns down than him running out of customers. What he lacks is time, and skilled workers to fullfill orders, which are much harder to come by than broken electronics.