That's the missing piece with these large scale deployments: is there an infrastructure to provide support, training and maintenance of the deployment. It's one

That's the missing piece with these large scale deployments: is there an infrastructure to provide support, training and maintenance of the deployment. It's one thing to push for moving from Windows to Linux, it's another to actually figure out the thousands of details that go along with it. What Munich did was essentially created a homegrown solution which suffers from all the problems of homegrown solutions. Yes, you get to tailor it to your business, but then you have to maintain it for decades. Inevitably industry passes you by, and you end up paying for a sub-standard proprietary (ironically) solution that has no widespread support and you're own your own for everything - from new features, to security updates, to training, to compatibility and interoperability. It's always great at the beginning, and it's always miserable 10 years later when the excitement goes away and the original champions have moved on.