I'm not against a fundamentals-based argument. The revenue growth is wild and their margins are reported to be great. But the existential concern remains: what happens if models start plateauing?

I could be wrong, but the margins are so good because there isn't a "substitute" for the frontier models. The performance difference between the latest Opus and a more open model provider is large enough to justify the extra cost. If that difference shrinks, I think the cost people are willing to pay will go way down.