Jason Snell blogging at Macworld about how much the Siri delay has affected other products:

Nothing exposes the imbalance between Apple’s hardware designers and its software organization than multiple products reportedly being finished months or years in advance, forced to idle because their software isn’t up to snuff.

Apple might’ve dug a bigger hole with Siri than we realize. While balancing on-device models and private cloud is good in theory, it has fragmented Siri across devices, making it all but impossible to roll out a new assistant to HomePods, for example. They are 2+ years behind.