A huge number. I do a lot of due diligence of companies, and the over engineering on the cloud and costs have to be seen to believed. A common theme now is people use lambdas and step functions in replace of function calls. So a page load or transaction may involve two dozen serial lambda invocations. It is madness.

By way of contrast, a payments provider we explored had four moderate sized boxes running everything. They were about six years old and fully depreciated, but more than adequate to run millions of transactions through a month.