What’s the actual lock-in, in practice? Seems like the switching cost is minimal, compared to the old days of Windows vs Mac where half your stuff wouldn’t run on the other.

Because the harness is in its early form. The more advanced harness in the current time look like Amp:

- Cloud workspace (Orb) and agents.

- Multiple agents with different LLMs and system prompts for different roles (Main, Librarian, Oracle...).

- A universal agent (Puck) for managing the whole workspaces.

- Web app or native app to work from any devices.

- Support subcriptions and API keys.