I think I had one of the best dreams for a nerd.

I had gotten my hands on a vintage CPU, one that my cousin owned back in the day, an old AMD Duron 700mhz. Probably came out somewhere around 2000. But that's not the good part. The good part was that I put it as a secondary CPU in my system, and I could dualboot an old Windows on it and play old games perfectly.

This made me think, could this become a thing? People speculate a transition to ARM PCs, and while the idea seems decent, there's the problem of legacy x86 software, especially games, and how difficult it would be to attempt emulation for them. Sure, you can emulate Notepad without being bothered by the overhead, but something that is CPU bottlenecked is out of the question for many generations.

So what if instead, your ARM motherboard had the ability to attach a daughter board that contain a x86 CPU, that allowed your PC to boot into a x86 mode. Or maybe have the OS be smart enough to be able to use it for x86 programs directly, instead of sending them to an emulation layer.