we're probably only a year or two out from LTE/5g being an option on Apple laptops, and I can see a bunch of other manufacturers jumping in a year after that to claim parity.

(Note: My estimate on this is purely based on Apple implementing/expanding the use of their own cell modems, which also includes their wifi chip. It seems logical that they would quickly adopt the same chip for wifi in their laptops, thusly getting LTE/5g 'for free'. Definitely no insider knowledge on this)

There's actually a known prototype MacBook Pro from 2006 with a cellphone radio, and the release MacBook Pros from the time all have a weird looking area near the battery and RAM where the SIM slot was supposed to be, and some leftover parts for the goofy little extendable antenna on the screen. Hopefully they end up doing it.

https://www.macrumors.com/2011/08/14/photos-of-a-prototype-m...