The IaC has to be rewritten, but often the application itself needs major modifications due to pervasive use of proprietary managed services. Vendor lock in is

The IaC has to be rewritten, but often the application itself needs major modifications due to pervasive use of proprietary managed services. Vendor lock in is a major problem. It's almost never simple unless an app is entirely running on a standalone VM. And if it is, you're probably wasting money running it in the cloud anyway...