> Right now, this has become a risky decision that can tank my business overnight. If your business-critical systems rely on SAAS that doesn't have a solid SLA and breach-of-contract provisions that more than cover the damages in the event, you've made "a risky decision that can tank [your] business overnight".

I'm pretty sure that a US government export restriction / ban / etc. would count as a force majeure invalidating all the fancy wording you could wish for on a piece of paper.

The only way to actually control is to self manage in an environment you control.