All that time for Unicode. Not concurrency or type safety or static guarantees or better lambda syntax or anything fun like that. Just Unicode.
The text changes are type safety, but there are many more miscellaneous type safety improvements (like the default comparison between types (alphabetically by type name, except NoneType!) being removed, so now you can use set comparison operators with confidence) – plus support for type annotations.
What do you mean by better lambda syntax? Is there something that you feel isn't adequate in the current syntax?
\x->> There is no sane way you could embed statements into an expression with whitespace-based block syntax.
Ruby does it. Of course, Ruby has a limitation that a function call may only have one "block", but still - Ruby blocks are statements embedded into an expression in a whitespace-based syntax.