Disadvantages of building a compiler and library on top of a specific memory management scheme

[logicchains]

On Saturday, 8 February 2014 at 02:03:00 UTC, Marco Leise wrote:
> Can we just copy Rust already?

Assuming D was able to incorporate all of Rust's memory 
management features, what advantages would it offer over Rust 
apart from superior compile-time metaprogramming? Personally, I 
think working to improve the garbage collector could pay off in 
this regard; "Both Rust and D allow you to choose between using a 
garbage collector and using referencing counting, but D's garbage 
collector is a precise concurrent generational moving compacting 
collector, whereas Rust's is a non-parallel non-moving 
conservative collector that's orders of magnitude slower and uses 
much more memory." Currently, even Go has a better GC than D.