Adoption of SaaS applications: What strategies do you employ?

Hi everyone! I hope this topic gather interests. It will be good to get this community’s POV.

SaaS adoption is now widespread e.g. O365, Salesforce, etc. We all have limited resources (time, staff). And our internal test automation and CI/CD will be very dependent on these Vendors.

If your organization is using a SaaS application(s), how are you handling the fast & frequent releases of these applications? For those who have not yet worked with SaaS apps, what do you think?