What systems will have CXL?

I believe Apple’s systems — at least their laptops — have CPU and memory in a single package. Apple manufacture versions with more RAM on the die, and sell them dearer; but eventually must reach the point where it’s not feasible to cram more memory into the same package. I can imagine them starting to sell systems with ‘hybrid’ memory, some faster and some not quite as fast, just as for a time Apple marketed computers with a large hard disk and small SSD.