It's as fun as writing Python (with a similar syntax), but it has essentially all the goodies you want from Lisp when you need them, runs as fast as equally optimized C, produces standalone native binaries, _or_ standalone JavaScript if that's your thing.
> except the ecosystem/commercial backing
If this is not the most important feature on that list, here is one more vote for Nim. Give it a try, it might (pleasantly) surprise you!
It should happen soon (TM), but from what I understand it will be just another version, just this time renamed to 1.0 - this basically means you could start using it more seriously even now.
Nim itself does not come with an IDE, but does include nimgrep and nimsuggest which underlie intelligence and other features in every IDE setup.
There’s also c2nim which will generate the bindings for you (though it might need some hand holding if the header files make extreme use of macros)