I'm in a family iCloud group with my parents... one day I just woke up and had all my podcasts and music replaced with my Mum's :/
Would not want this anywhere near a "business" experience
There are several cheap MDM solutions for Apple devices that I would rather pay for than be dependent on this. (We've used SimpleMDM and love them.)
Like really Apple, that's your device "locking"? I could test activate my work Mac with my personal Apple ID while doing this, no alarm bells, nothing, effectively "It's your laptop now".
We had to do it as ppl had made personal Apple accounts using our domain, meaning if they logged in with such an account and left, their iPhone magically transformed into an expensive, elegant paperweight. Due to a setting in our previous MDM we were unable to migrate data cleanly using Apple Biz Manager without committing to use ABM as our MDM (we couldn't) so we told people to "move it yourself following these detailed instructions, otherwise it can't be migrated." Regarding personal data like health on company-managed devices, I certainly don't share that type of info with my employer, and make it clear to staff that it's not our responsibility to migrate such data.
I'll try again next month see how far I get with this. This needs to be way simpler than it currently is. Hopefully they fixed a few things there.
Google and Apple require it for lots of mobile apps targeting certain consumer segments because some countries (eg: Brazil, IIRC? don't quote me on that) have chosen to use D&B as a qualified unique identifier of business legitimacy and it requires exposing personal information of your company's leadership to them.