I never felt like syncing my devices besides steam cloud saves. Too much convenience makes me uncomfortable. Especially if it means mixing corporate and personal stuff.
Yeah, can also view email on both phone and computer since forever ago - this is not even remotely similar to the shared clipboard of an iPhone and Mac, where you don't need to open any links or programs, install anything, configure anything - you just copy on phone/computer and then instantly are able to paste on phone/computer.
Have you ever wanted to copy anything from A->B that wasn't a 2fa text, a password, or a url? I certainly haven't. An android phone out of the box supports syncing tabs and passwords and provides a trivial way to copy 2FA codes with a built in feature.
So your argument is that because the things to copy are few, this feature doesn't matter? Or what? I fail to see how what you say contributes to the discussion of vertical integration in any way.
Not few none. People need to share files, tabs, messages, mails. If you can share the things people actually want shared then sharing the clipboard itself has zero value.
Your response is completely irrelevant to the discussion of vertical integration. Whether or not you find use in it is up to you, and I don't really care.