You lost me at Apple. Apple owns around 15% of the PC market space and almost the entirety of that is Intel-based systems. Outside of HN, nobody cares about the M1 chip, it isn't a selling point to my mom or her friends. If someone at the Apple store recommends it they might buy it instead of an intel-based system but it definitely isn't something they're seeking out.
The only threat Intel has right now in the consumer space is AMD, and it's a very real threat. AMD won both Sony and Microsoft console designs, and the mobile Ryzen 5000 chips released at CES look to have enough OEM design wins to put a serious hurt on Intel in 2021.
Even if Apple goes 100% M1, there's the other 85% of the market that Intel is likely far more concerned about.