I have tried D, loved the language but I feel the ecosystem and environment issues need to be addressed asap. Here are a few inputs (1) setting up env different operating systems eg GNU/linux variants. Compilers ldc, etc are not really easy to setup on all systems.

(2) Memory usage during compile can get out of control resulting in mid-build crashes if sufficient memory is not available.

(3) Setting up of a simple http server should be made simple. (ideally the way Go allows to convert any regular Go program to a http server)