Highly unlikely considering it also contains the secure enclave and considering it's PKI-based security you will only ever get chips that are matched to a serial number. Pretty much the same way Intel chips are matched to Intel PCHs using the CPU ROM. You can of course get the PCH and the CPU from Intel, but you'll never get the firmware to load on them unless you're a mainboard manufacturer.

Considering the secure enclave is also used for data encryption, anti-theft and machine identification to APIs like iMessage, it's probably not a good idea to have them available on the open market in manufacturing mode anyway (unless someone comes up with a smart way to have PKI while also having free-for-all).

It would be hard to use such a chip since it's so customized for Apple hardware, and it's likely only available in BGA(?) or similarly consumer-unfriendly manufacturing oriented packaging.

I would really love to see an ARM64 ecosystem similar to what exists for PC hardware with motherboards and chips and other parts available. The chip for that would probably be the Graviton or something similar, and apparently that chip is being sold to other vendors including high-end router vendors like Mikrotik.

Unfortunately I do think the M1 beats the crap out of the graviton in at least single core performance, but I think that's because the M1 is optimized for fewer beefier cores for desktop work loads where single threaded performance matters more. Graviton is mostly for cloud and other applications where most work loads are highly multithreaded or multi-tenant.

the problem is more often in some specific chips that burn all the time (USB-C, battery controller), are rather cheap, and are un-available because Apple (and others) forbid the manufacturer to sell those separately.

there are plenty of videos of Louis Rossmann on this issue last years, if one of those 1$ chip burn the whole motherboard is good for the bin. the "good" news is that there will be a supply of M1 chips from these boards, if BGA (un)soldering is your thing.

Apple isn't going to supply bare M1 chips. They may let you buy a replacement mainboard for basically the price of a new laptop though.

No it probably means that with a valid M1 Mac serial number you can buy the entire logic board for $800.

I don't think it will ever happen, they are sold to the motherboard and their efficiency probably depends on that.