I've kept an eye on Arc for years, with my 100-year language glasses on. How do you feel about Arc as the 100-year language as described in your essay? It's been 9 years since the essay; any plans for a followup, or do you feel that it's held up over time?

I don't get to work on it much now. I hope there is little in it that wouldn't be in the 100 year language. But there is also little in it.

Would you recommend Arc to modern startups in general?

No, I don't think so, not in its current state.

Why not? Have you used a language other than Arc to write a web app recently?

If writing web apps in other languages isn't still painful where have other languages/frameworks caught up?

It's still missing some things that most people take for granted.

Are there any Lisps you would recommend (other than Clojure)? (Or languages?)

Clojure is probably the best bet. I don't know much about it but lots of people seem to use it, and any decent Lisp that lots of people use is probably a good bet.