From the time Apple bought Siri, it hasn't even delivered on the promises of the company it bought as of yet. It's been such a lackluster product. I wouldn't count them out, but it doesn't even feel like they are in.
If you'd have told me 10 years ago that Apple would wait this long to update siri I would have been like no way, that's crazy.
Businesses have to focus and it made sense to drop this as a priority.