I think that's exactly their plan. Apple already charges a fortune on RAM (more than 3× 3rd party price on mid-2020 iMac, for example) but at least now they give you the option of upgrading later or buying your own without voiding the warranty. With Apple Silicon, that option might be forever gone. People are rejoicing about the power of the M1 chip. But most don't realize with tighter integration comes tighter control. Once Apple controls every aspect of its hardware,
- Consumers are left with no 3rd party replacement/upgrade options, and
- Apple can charge more on the upgrade options they offer you.
So even though one of the promises of Apple Silicon was, once free from having to buy from Intel, that the cost will come down significantly and that the cost-saving will be transferred, at least partially, back to the customers. But since we will no longer be able to affordably future-proof our purchases and points 1 and 2, we will actually be pulled further into the ecosystem. Consequently, Apple will actually be able to charge us much more and they will.