Hi!
That's all we can afford as researchers, unfortunately :-) I hope to build more (and lots was built in my spare time), but my currency as a researcher is publishable results, and sadly, not many SPARQL features are.
Understandable. And now since we have working TPF server and the prototype, I imagine people can build on that. We probably should not expect to use this as generic SPARQL engine (we already have that one) but I wonder what use cases can we improve with it.
PS There are plans for a new open-source SPARQL/JS engine powered by a larger development team, but that will take its time.
Interesting, glad to hear this.