If eat-in restaurants become less viable, they will start to die off until enough are left to bring their viability back up (more people interested in eating per restaurant). We can't keep business open for the sake of the few who want to feel good about them existing, unless they serve a crucial role, which I don't think can be said about restaurants. If people strongly prefer cloud kitchens, there's no economic point to expensive, seat-in restaurants.

That being said, the seat-in scene in London seems to be thriving, though I'm curious if the inflation is hitting them (or us, the diners).