There are a significant number of extremely large companies that are wholly interested in such a sub-processor. The tier of data sensitivity is irrelevant.

Almost all companies are content to engage with data sub-processors with respect to customer data or some form of PII.

But there are many that will absolutely not let their IP visit or reside on systems they do not control.

This is absolutely a deal breaker for a ton of organizations and it's not going to trigger industry wide adoption like other comments here suggest. Instead another provider will offer a more appetizing deal and they will win market share.