Lol, OP here, I guess in an indirect way that's how it came off. I don't really think everyone should write in Lisp, but rather that we all should be able to write interoperable code, and one suggested solution is a tree like structure - which happens to be Lisp. Maybe a Unix pipe type construct would be better? Just some thoughts on a lazy Thursday afternoon.
I read this as:
"There are too many programming languages. Why can't everyone just use Lisp?"
I laughed a little to myself due to the Lisp user stereotype of parading Lisp around as every programmer's savior. Did it come off that way to anyone else? I don't mean to offend, as I rather enjoy Lisp too. But I felt the premise of the article was "all code should transpile to other code" and I ended up reading it as "all code should be Lisp".
Maybe that was the intended humor. Maybe humor wasn't intended. Either way, I got a laugh out of it.
There are a ton of libraries/wrappers use to run X code in Y language or middle-men. Rubypython [一] comes to mind. While it doesn't fully cover the problem it's a start. However is that method the one we want to use? Does a better method even exist or is a better method even possible?
[一] http://rubypython.rubyforge.org/