I don’t think anyone’s calling it a scam, but it’s pretty clear as an outside observer that a very specific point was questioned (about where JPlus fits into the existing ecosystem) and your replies have very little to do with that topic.
Also, your replies really do look AI-written. I know it’s hard to be sure, but humans expressing a point don’t usually write summaries in the fashion of your replies and LLMs almost always do.
Anyway, personally, if I have an existing application java program then maybe there’d be an argument to use a lightweight syntax extension to continue developing it more safely. But if I were starting a new project, whether a library or application, I would just use Scala or Kotlin from the get-go. The JVM platform is already versatile enough to get us much more than just some basic extra type safety and boilerplate generation. I’m all for static analysis tools, it’s just (again) hard to see what you get from JPlus that you can’t get from either groovy or a better language.
Your replies don’t address that at all.
The C Preprocessor also does all of those things. That’s expected of a preprocessor. If you say “you can write java code with a bit of extra sugar and JPlus turns it back into ‘regular’ java,” then that’s a preprocessor.