Imho that wouldn‘t cause quality to go up. It would just make it more expensive to develop and to fix bugs. Even more cover your ass would go on. Or at least a

Imho that wouldn‘t cause quality to go up. It would just make it more expensive to develop and to fix bugs. Even more cover your ass would go on. Or at least a huge share of that burden needs to be on the client so that they define and then test and control the SW they receive properly. The problems with the software sound like typical big software project problems. Trying to cover a huge breadth of use cases with lots of very important tiny details and released in a big bang (one migration). It sounds like more of a project mgmt problem than a software problem to me. But maybe I am just a hammer and see nails everywhere.