Tip of the iceberg
Even the C guys will admit it compiles too damn slow; Go doesn't. GCC has always been slow, but autoconf/autocrap is far worse. Linux+package build times could be maybe 10-100 times faster just by switching to cmake.
However, that won't change the fact that Linux/Unix toolchains/libs/environments are cumbersome and bloated. It'll never be as frictionless as say JS, it'll never be ported to a better language (not even a modestly-improved C), and it'll never be guaranteeably secure. It's the best thing going now, but it's a dead end, and as a sysadmin I'm afraid it's all going to unravel in the next few years (months?) in the face of increasingly sophisticated attacks.
I would put my money - and time - on new OSes, languages, and hardware, all designed for simplicity and maintainability and uniformity. And that's for a secure communication platform only, not fun stuff - you can't have it all.