That's very true, and I would love to learn about ASM and opcodes as well. I'm not particularly wanting to develop my own, but at least contribute like you said. I've always been intrigued by gaming console emulation, more so now that I have a better understanding of it. There's a scene dude from RED Crew that goes by Xylitol that managed to push 32bit code to a GBA and run it successfully, which really piqued my interest in the whole manner.

https://youtu.be/1xkteVQTfUo