Besides, Apple doesn't care much about market share. The majority of the market are cheap, low-quality computers and users who want free or cheap stuff. Apple is only interested in the premium market, where customers have money and are willing to spend it. Just look at iOS vs. Android situation. It's almost 1/4 in terms of market share, but iOS app revenue is around two times higher than that of Android. Totally different markets, totally different business strategies.
I would like to add, Apple doesn’t view the PC are something most people will buy every 3-5 years. After Jobs famously said, “the PC is dead,” he wasn’t too far off the direction buying decisions would begin to swing. Just from my friends circle, I’m one of the few who still buy PC/Mac hardware. Some them still haven’t bought a new machine since 2009-2012 (range specifically), they’ve told me their phones (or tablets) do all the things they need. So, their PCs are either shoved in a closet or corner, they’re using smartphones for their normal usage. There are still lots of cheap Windows machines out there, but the usage is VERY low. Jobs said in the same breath the PC is still a backbone, but it’s the “truck” of the tech world with people upgrading every 7-10 years rather than old nineties and early 2000s mentality of replacing every 3-5 years. We haven’t really hit the year of the tablet yet either, which I believe is still happening.
Also, I believe the chip shortage hit the M2 line and Apple rolled with it. They have to plan these things far in advance for the sake of mass production and logistics. That’s why you never seem them make knee jerk changes to the hardware, like the very slow adoption of WiFi 6 was probably something thought out to run down their stock of wireless chips. Make one change to the board, you might have to make more of them just for one modification.
With that said, I think M3 line will be a great spot to jump into Apple Silicon for me. Apple might be giving Qualcomm a little running room (not intentionally) to help propel Arm (and RISCV) chipsets into the Windows world. This will benefit Apple’s Mac future, if Windows starts heading toward Arm-powered machines and away from X86.