The option of using managed cloud services (e.g. databases, auth, app platforms, load balancing, etc...) is very attractive, but the concern is leaving large segments of the market on the table due to a lack of private deployment options.

I see major SaaS applications that manage what could be sensitive (business) data which are cloud-only (e.g. Slack), and some that provide private and cloud deployment options (e.g. GitHub). Is there a consensus on this today? What does this decision tree look like?