Apple is singlehandedly using up almost all of TSMC's 5nm processes. There are no smaller processes available anywhere in the world, and Samsung's is disappointing. Processes that have largely been driven by demand from AMD and Apple (EPYCs and Ryzens from AMD, and Apple's mobile chips). They capitalized on nothing except having fat wads of cash to slap people around with.
Additionally, it's not "being a RISC architecture" that makes the M1 a beast. Slap a 5950X on a SoC with directly available memory and GPU, and you get similar (better, even, considering current gen CPUs do get better performance already) results. "Deep integration of an entire stack makes things more performant" is not a new thing, it's merely that Intel and AMD have been upholding the contract of x86/64 that is interoperability and replaceability (well, Intel has been doing some socket fuckery for upgrades, but upgrades are still entirely possible), and Apple can afford to throw it away.
EDIT: bUt ThIs oVeRlOoKs PoWeR CoNsUmPtIoN
I swear I'm going to come out with a souped up raspberry pi and tell HN "look, it uses 1W of power for 10GFlops" and you would buy it because tHe PoWeR pEr wATt iS BeTTeR !11!!