It may be that for small projects, this is mostly a non-issue. Historically, heterogeneity has been a big problem for a long time. Vendors want lock in; custom

It may be that for small projects, this is mostly a non-issue. Historically, heterogeneity has been a big problem for a long time. Vendors want lock in; customers don't. Much of Oracle's early success was about being hardware agnostic. Similar for Java. All that XML nonsense, that everybody hates but that has incredibly widespread adoption, was also about inter-op: it's crap, but it's ubiquitous crap. Now, I don't know is this is an issue in the cloud. But vendors will want lock in; customers won't.