We have an alternative that isn't 10x slower, and comes with many other benefits (Rust). The only cost is losing hardware support for some very obsolete and very unpopular platforms. (Nevermind that Fil-C's hardware support is narrower than Rust's.)
Rust doesn't automatically add memory safety to all existing C code, which will need to be maintained for decades, Fil-C nearly does and its still early days.
> We have an alternative that isn't 10x slower, and comes with many other benefits
Anyone involved with development around a fruity company would say Swift ;)