Where does Lovable draw the line as a platform? What can it not do?

The line exists and it is moving. If you are building something that needs to handle hundreds of thousands of simultaneous users at a global scale, that is outside the current boundary. If you are building something like Facebook at its current scale, you need infrastructure beyond what Lovable provides today. But for the vast majority of software that most people actually interact with day to day, it can be built on Lovable. The thing I hear from customers is that they end up with a better, more thoughtful product than if they had worked through slow handoff cycles with a development team, because they are the person closest to the user and the closest to the problem.