Perhaps one could say that about systems programming languages as well, including Rust. It'll be slow(er) to develop, and there will be much wailing and gnashing of teeth.
The word "systems" is increasingly relegated to a smaller fraction of the codespace than used to be; one wouldn't have considered building a high frequency trading system or a call handling system in a non C/C++ language in the mid 90's, but Java and Erlang get the job done well enough.
As always Alan Perlis said it best (in his "epigrams of programming"):
A programming language is low level when its programs require attention to the irrelevant!
