MULTI has yet to be installed in an actual building and from what I recall, they believed it would likely be used in new buildings that are designed with MULTI in mind rather than retrofitting older buildings.
It seems like a good use case in my mind, though I don't expect it would be implemented for at least several years while the new technology is adapted and tested in real-world scenarios
Is it fully tested yet, that page says their new tower "will" (not does) provide testing? It's not the sort of thing I'd want to be an early adopter on.
Tom Scott did a video[1] on it last summer. They have a working version in a test tower in Germany, but have not installed it in an actual for-public-use building yet and I'm unsure if testing phases have been completed
It seems like a good use case in my mind, though I don't expect it would be implemented for at least several years while the new technology is adapted and tested in real-world scenarios