Thanks for the encouragement, everyone.

And thanks for the medal, An4ximandros.

I should note that the skepticism of mjn.mixael and NGTM-1R is reasonable; there are still several pieces needed to be put together before you can start up the installer and have it work start to finish. But the download panel that I just completed is a major step (and one of the final major steps) in that direction.
As for Java...
It is also one of the very few platforms where one can write code that works the same way across all the platforms we support.
By the way, griping about the choice of language now is a bit late, given that the installer, even in its previous incarnation, has always been Java.
This, exactly this. Additionally, there is a critical point about the recent Java security vulnerabilities that isn't being emphasized: they apply to Java
applets rather than Java
applications. Java applets are what run in your browser, and they tend not to be popular these days because everyone prefers alternatives such as Flash -- which is one of the reasons Oracle was caught off-guard. Java applications are what run on your desktop. The FSO Installer is a Java application. If you disable all your Java browser plugins, you'll be fully protected from all the security exploits, and you'll still be able to run the Installer.