Traditional agencies carry a lot of weight: account managers, junior staff, meetings about meetings. You pay for all of it, and your work passes through many hands before it ships. A small studio strips that out. Whoever sold you the project is whoever builds it, which also means there is nobody to hide behind when it is late.
AI is what makes the model viable now. It handles the heavy, repetitive lifting that used to need a roomful of people, so a senior operator can move at a scale that was not realistic a few years ago. It does not replace the judgment, which is the part you are actually paying for.
The honest trade is range. A small studio focuses rather than offering everything under the sun, and there is a real ceiling on how much work can run at once. We would rather do a sharp set of things genuinely well than spread thin and promise the world. For a new brand, that focus and a direct line to whoever is building the thing is usually worth more than a big logo on the invoice.