Heroku is another example. Can’t trust your business to shaky foundations. The moment they started to have frequent outages your company should have been migrating ASAP.
As a side note, I would never use nor invest in brand new databases. Database tech needs to soak for 10+ years before I trust the software is stable and the organization behind it will exist longterm. A startup using a shiny new database is evidence of weak engineering leadership. Similarly, Terraform / Cloudformation is easy enough that needing something other than AWS tooling itself is making less sense from a cost vs. convenience perspective.