There's more files yes, but I don't agree that it's more complicated because those files come together in the form of some well understood components that almos

There's more files yes, but I don't agree that it's more complicated because those files come together in the form of some well understood components that almost anyone who's done a bit of Linux admin understands to a reasonable degree, whereas your hypothetical Go application is going to end up being a completely custom implementation of NVMe-TCP, and if there's any problems with it you're on your own.