Wall also touched on the long delay for the release of Perl 6. "In the year 2000, we said 'Maybe it's time to break backward compatibility, just once. Maybe we can afford to do that, get off the worse-is-worse cycle, crank the thing once for a worse-is-better cycle." The development team received a whopping 361 suggestions -- and was also influenced by Paul Graham's essay on the 100-year language. "We put a lot of these ideas together and thought really hard, and came up with a whole bunch of principles in the last 15 years." Among the pithy principles: "Give the user enough rope to shoot themselves in the foot, but hide the rope in the corner," and "Encapsulate cleverness, then reuse the heck out of it.."
But Wall emphasized the flexibility and multi-paradigm nature that they finally implemented in Perl 6. "The thing we really came up with was... There really is no one true language. Not even Perl 6, because Perl 6 itself is a braid of sublanguages -- slangs for short -- and they interact with each other, and you can modify each part of the braid..."
Wall even demoed a sigil-less style, and argued that Perl 6 was everything from "expressive" and "optimizable" to "gradually-typed" and "concurrency aware," while supporting multiple virtual machines. He also notes that Perl 6 borrows powerful features from other languages, including Haskell (lazy evaluation) Smalltalk (traits), Go (promises and channels), and C# (functional reactive programming).
And towards the end of the interview Wall remembers how the original release of Perl was considered by some as a violation of the Unix philosophy of doing one thing and doing it well. "I was already on my rebellious slide into changing the world at that point."