To precize how H9 can load an IR. My crazy idea is that eventide propose a small software that encode impulse response (.wav file from tone matching for example) as algorithm. The algorithm would be then an IR encapsulated in the H9 algorithm. As parameter, one could imagine some adjustable resonators.
The number of IR loaded depend on the available memory.
I do not know if it's technically possible to give the user the ability to create its own "personalized" algoritm, and then load it in the H9. It's important because, the strenght of a Impulse Response reader would be to import it's own IR.