Agreed, the AA AI response is always fast. But normally, doesn't add anything to the discussion. I've definitely had AA take over a month to review my subsequent reply. As recently as last summer.
But from my point of view when submitting a claim... makes no difference to me whether I get resolution tomorrow or in 6 weeks. The event has already occurred. I'm not going to fly AA/AS less because they take a longer to respond for post-travel support. I suspect that's what they're banking on how others will react as well and why they underinvest on resources in that area.