I've used c and java, and have recently been thinking about go. It's interesting that the comments here only mention go in the negative. Can someone give me the back story about go?
But for system programming, which is generally understood as developing OS kernel (filesystem, memory management, device driver etc) or embedded which you built a mini OS), then Go is not the proper choice (features like coroutine, AFAIK, needs OS). You'd want C/Pascal/Rust/Zig/<what else?> ...
But I have been recently using it for some tooling and small servers on personal projects where I'd have used python before.
Frankly it's been a joy and I wish I'd started earlier. The concurrency primitives are great, and the static binaries make deployment easy (raspberry pi in this case).
Struggle to use anything other than python professionally, the need to settle on a common denominator trumps pretty much everything else.