The MacBook Air you're using has a proprietary SSD interface from Apple, so you can't directly use a regular M.2 SSD from the market; you have to go through an adapter. For instance, the Sintech M.2 NGFF SSD to 26Pin Adapter has a good reputation within the Mac community. Don't forget to back up all your data before installing the new SSD. Checking the website for information about SSDs can help you make a better choice.
So, if you've just picked up a new SSD to swap out your old one, here's the thing: your new SSD is going to be totally blank, no file system on it at all. So, the best move is to clone your current drive to the new one, just like MRMAX1984 suggested in reddit. That way, you won't lose any of your precious data. Ifixit is a great place for this kind of stuff, they've got plenty of tutorials. Here is a videos that might be super helpful for you. You can find more tutotials on ifixit. How to Upgrade or Replace the SSD In Your Steam Deck OLED! Also, you'll want to figure out which motherboard you've got, so you can pick the right SSD for it. You could always try these guys in China https://www.jakelectronics.com/category/...
Yeah, about your question, upgrading or swapping out the CPU or GPU in a Quest 2 is definitely a technical challenge. The thing is, the CPU and GPU in the Quest 2 are tightly integrated into the device,not like you can just pop them in and out like in a desktop or laptop, which means finding the right replacement parts would be super tough. And then there's the fan motor upgrade, which, while doable in theory, requires you to think about power management, cooling system compatibility, and space limitations—no easy feat. the more realistic approach is to just wait for official system updates, or if you're really chasing that next-level performance, maybe it's time to think about getting your hands on the next-gen hardware.
It's an interesting idea, but even if you find a logic board that fits in size, you'll need to make sure the new logic board is compatible with the original connectors, screens, keyboards, trackpads, and other peripherals.