I would love to know why Siri has clearly deteriorated. I assume it’s opaquely failing due to server infrastructure not keeping up. Thought device-side was supp

I would love to know why Siri has clearly deteriorated. I assume it’s opaquely failing due to server infrastructure not keeping up. Thought device-side was supposed to help with that. That’s another thing I’d like to understand — what are the moving parts to Siri?