I think interoperability is enough. It might be nice to see LotusScript in more places.

Sorry. I seem to be unable to understand you.
For me my job as coder is not about knowing "functions" of programming languages, but about application design & architecture, understanding requirements from customers and providing business value based on those requirements.
I suck at remembering syntax details. Google and documentation help me to minimize my flaws quite effectively.

I don't understand the demotions on this one. Having all of the same API objects available in the major languages (LotusScript and Java) would be a real boon. I would like to code all of my agents with more depth than is easily done with formula in Java, but UI work in Java is not possible.

I don't think the original poster is asking to have, for example, the Java standard libraries available in formula language.

@3, Exactly. Notes is advertised as being flexible enough to allow building apps in any of the supported languages. The truth is, you often need to know them ALL, and it is an irritating discovery when you're trying to learn how to build more interesting Notes apps and need to learn 3 languages at once in order to get certain results.

It doesn't inspire confidence in new or future developers.

@3 - Let's not go for the lowest common denominator as this would be the result. Let's, rather, have one language to covers all the features of the Notes platform that you want to exercise at any given time. There are two ways of delivering Notes/Domino applications: on the desktop and on the web. So to that end there might be specialist languages that let us take advantage of specific features present in either environment. Besides that difference we are still in one domain, collaborative business apps. If you wanted to do some data mining then I would suggest incorporating a different language especially suited to that task.