Alembic -
We’ve looked into it before, but are currently focused on better C4D support. With that said, if there is enough interest we are open to the idea.
Houdini -
Not for now. We have Blender pcache support and Real Flow import /export support, so it’s not something we are against. Again, with enough interest we could look into it.
While different types of integrations aren’t out of the question in the future, our experience is that people fluent in Houdini often finds Notch to be “the real-time version of Houdini”, and that’s probably a good way to think about it.