I'd love a working replacement for Sublime Text written in Go rather than all of these Electron based editors. Lime Text is kind of alpha quality.
Coincidentally, code written in C doesn't have that problem.
Stability is guaranteed on userspace API level - e.g. libc. So well-behaving apps are supposed to just use that, and let it handle syscalls. But Go doesn't.
The system libraries like libc themselves use syscalls internally, yes. But on those platforms I'm talking about, they're maintained by the same people who maintain the kernel, and both components are versioned together. So they can go and change a syscall, and then also make the corresponding change to libc (without changing the latter's public ABI), and ship the updated versions together as the new OS release. Well-behaved apps dynamically link against libc, so the change is completely transparent to them.
On Linux, different people maintain the kernel and libc (and, in fact, there's no single officially blessed libc - this is one case where the old adage that "Linux is just a kernel" is in full force). Consequently, the interface between the two has to be treated as a public API, with stability guarantees.