https://portableapps.com/apps/development/swi-prolog_portabl...
It's about the ONLY PortableApp that offers any kind of program development capability beyond text editing, that I could tell. No compilers, no interpreters outside of this and a couple of SQLite packages. Anyway, I pulled this one down, fired it up, and... no worky. I got a console, theoretically I could execute commands, but try and access the help or docs, and it bails out with an error, telling me xpce can't be loaded, because load_foreign_library/1 is not defined? At least half the menu commands failed with the same error, closing out the app in the process. Basically, the app is impossible to use.
So, there's my answer, one that can be applied to many otherwise promising languages. Any system looking to gain traction really needs to go out of its way to Just Work; to make itself readily available, easily installable, immediately functional, and with clear documentation right at hand. You can carry on 'til you're blue in the face about lazy programmers unwilling to learn a simple build-and-install process, but with the ready availability of other environments that generally Just Work, there's really no excuse. At least, that's how I feel about it.