[beagle3]

Nim is optionally garbage collected. Most of the standard library opts to use the garbage collector, true, but here's an example of a beginning of a tiny OS kernel in nim[0], that does not.

I do not know enough of Zig to compare the complexity, and Nim is indeed not simple. To borrow from the zen of Python, it is complex but not complicated; and most of its complexity is of a kind you can almost entirely ignore until you need it, and when you need it, you're in trouble if your programming language doesn't provide it. e.g. operational transforms, macros, compile time execution. pragmas.

[0] https://github.com/dom96/nimkernel