Essentially. I'm not sure you could call it IAC specifically, but the same ideas apply.

Regarding lock in: I don't necessarily think there is anything here that is stopping you from writing TF and importing objects. Conversely, SI is great for importing resources into their model.

So the objects are essentially modeled in type script on the back end so support for other vendors is available. It's just whether or not they are created yet. I'll let the SI folks dive into details there.