I wonder what interesting things are in Apple's completely undocumented chips? There is that famous saying about known unknowns and unknown unknowns...
That isn't true. AMD aren't great at it, but Intel publish thousands and thousands of pages of manuals. They don't have the secret sauce in them as per se but Apple literally will not publish jack shit about anything inside M1.
There's also the "unpublished" stuff that occasionally leaks here and there; not something which I suspect will ever happen with Apple, but you never know...
>The demonstration website can leak data at a speed of 1kB/s when running on Chrome 88 on an Intel Skylake CPU. Note that the code will likely require minor modifications to apply to other CPUs or browser versions; however, in our tests the attack was successful on several other processors, including the Apple M1 ARM CPU, without any major changes.