It's hard to do, but I would like to see more overhauls of existing languages. I wrote a relevant comment about the approach of Checked C vs. Rust here: https

It's hard to do, but I would like to see more overhauls of existing languages. I wrote a relevant comment about the approach of Checked C vs. Rust here: https://news.ycombinator.com/item?id=17944310 https://news.ycombinator.com/item?id=17944310 (tl;dr Software gets rewritten much less frequently than you think. Rust is going to add to the existing ecosystem in C++ and C, not replace it.) Facebook's Hack is another example of this approach -- an overhaul of PHP. Although I guess it led to 2 languages and not one -- it's not replacing PHP! Like I said, it's hard :)