Article makes the claim that Siri is playing catch-up, and I kind of get that. We've been hearing that for years.

Of course, Siri has also improved over the last couple of years and while the general consensus continually seems to be that Siri is "behind" I've yet to see a decent analysis that demonstrates just how far Siri is actaully behind Google Assistant and Alexa from a technical standpoint.

What do they do toady that Siri does not?