- iOS/iPadOS AppStore vs. macOS AppStore + ability to install apps from the web (I can't even compile FOSS apps on my own without owning a mac + 100$/year dev licence - this is a real shit show for me!)
- mostly paid & stripped down terminal apps vs. a real native terminal (and of course just installing iTerm2 because you can do so on a mac)
- no "real" apps like on a desktop machine. As I mentioned in my CON's I would love to use a real browser like Firefox including Add-On's because the web is unusable in many cases without blocking and filtering all the evil scripts people use to make some extra money. Also I would like to use the Adobe products (photoshop, illustrator etc.) and not the stripped down (and from what I heard also bad) pseudo-apps. Finally I have a device that could replace things like a Wacom Tablet connected to your computer but that opportunity was missed. Very sad.
- no up- or downgrades as you please because Apple likes to force you to go to / stay on certain versions of their OS on the mobile devices to "motivate" you to buy new ones once in a while when they need more revenue.
- no free choice of OS. My MBP runs macOS and linux and if I would need it I could just install windows as well (uagh!).
There is much more to this but I think the issues mentioned should be enough to draw a clear picture of the paternalism Apple treats it's users of the mobile devices with. I don't like this at all and it was THE deal breaker that prevented me from ever buying a new iPad.
If they get worse as the MBP's do, I would also take care and probably never buy a new model and instead stick to an old one that is a combination of some "freedom" (the max. level Apple allows you to do anything with it), enough quality (good product, not too many beta-experiments) and stability (software is new enough not to be dangerous to use).