I'd like to have a Dylan dialect based upon Clojure concepts (the Sequence abstraction and immutable collections being two that come to mind). It would also need Clojure's idea of being a hosted language to get past the lack of libraries.

As a Clojurist not familiar with Dylan, that sounds awesome, but then it also just sounds like Clojure. What does Dylan add to the mix?

I'm reading their "Why Dylan?" page:

http://opendylan.org/documentation/intro-dylan/why-dylan.htm...

and I don't see anything that makes me want to go run and install it. I'm already used to dynamic, garbage-collected, infix programming languages that can be used in a functional style. Heck, JavaScript is one. Integers and strings are objects, cool, but how does that help me prototype faster or write more maintainable code?

You're missing the optional static typing, the multimethods, the Common Lisp-style condition system, the ability to produce native and efficient executables ...

> optional static typing

https://github.com/clojure/core.typed

> multimethods

http://clojure.org/multimethods - also, arguably better for many use cases: http://clojure.org/protocols

> native and efficient executables

Clojure performs much better than popular web development language implementations like Python, Ruby or Node.js. See http://www.techempower.com/benchmarks/ People have found it performant on harder problems: http://clojurefun.wordpress.com/2013/03/07/achieving-awesome... And it's possible to produce executables that depend only on the JVM, which is just as easy as fully-native for deployment.

I grant you the one about the Common Lisp condition system. I wasn't familiar, but reading about it (http://c2.com/cgi/wiki?CommonLispConditionSystem), it does look intriguing. Apparently something inspired by it is available as a Clojure library, but the last commit was 10 months ago, and I hadn't heard of it till now: https://github.com/scgilardi/slingshot