FWIW I've been following this field obsessively since the BERT days and I've heard people say "just a few months now" for about 5 years at this point. Here we are 5 years later and we're still trying to buy more runway for a feature that doesn't exist outside science-fiction novels.
And this isn't one of those hard problems like VTOL or human spaceflight where we can demonstrate that the technology fundamentally exists. You are ballparking a date for a featureset you cannot define and one that in all likelihood doesn't exist in the first place.