alt Hacker NewsEmulator maybe? It's a weird and intersting platform to target, but I suspect that it's because Go supports it, so it might not be to much hassle. On the other hand reading the article from yesterday regarding porting Tailscale, it might be more involved that I imagine.
Yeah go supports AIX. In fact I remember it having bash, and a package manager so it felt like home. AS400 was an interesting platform. I was fascinated with their almost assembly like programs, alien UIs and decades old hardware. Almost got nerd sniped. Unfortunately, I was told to use java. The jar I tested on linux worked perfectly the first time, so I couldn't even learn anything.