Modern language wish list

Here's a cool post.

• String manipulation (regexp, splitting, joining, replacing)
• Polymorphism
• Basic containers (list, array, hash map, set)
• I/O, including easy binary (and, I'd add, UTF-8)
• Web requests
• URL manipulation
• Garbage collection
• Namespaces
• Homoiconicity
• Extensible syntax
• Math (actual numbers, matrices, vectors, equations)
• Units on numeric values
• Time (time, dates, calendars)
• Error on numbers (+1 for tracing the source)
• Unification/pattern matching
• Before/after functions (aspects)
• Parser
• CSV library (I'd say more serialization built in than that, but it's going in the right direction)
• Good error messages
• Immutable values
• Explicit model of time (for concurrency)
• Graphics
• Sound
• Common file formats
• Game input
• GUI
• First-class functions
• Easy way to store data in flat files (which I think is kind of redundant with CSV above)

Decl is kind of going in this direction.