One that’s be a nice quality of life improvement in MacBook(Air/Pro) is built-in 5G connectivity. I’d spring for that convenience not needing to connect to a hotspot draining precious battery on my phone. I thought we were closer given Apple started making their own modems, but it is still a miss.
You used to be able to get a sim thing in IBM thinkpads but it didn't sell well. I think people don't want two data contracts. It might be better now with esims and stuff though.