Machine voices are sounding more lifelike because they're not just paying attention to varying inflection but also artificial pauses with varying time.
These aren't even hard tweaks.
I cobbled together a chat bot using ALICE frankencode back in the day and two ways I fooled people with it...
Emma Evans
An absolute horrific nightmare of two AI bots caught in a loop with each other is the perfect example of the total nothingness of AI “brains”.