I don't think asics specific to a specific model or even model family are likely to be commodity hardware anytime soon.

It's extremely expensive to build that and you'll be at least two major model generations behind before you even get your first wafers back. By the time you got your production run ready to go and packaged for market nobody's going to care.

Once we end up going something like 24 months between major advances and capabilities for these models then I can start to see asics for a model being possible.