I never understood the all or nothing approach. I use grapheneOS as my daily drive for work, and have multiple profiles for each of my needs. That’s probably all you need, however I do have an iPhone (lots of !y family do imessage and we are sadly in the ecosystem I use apple music for example. I like also some apps more on iOS. Especially for mastodon, but even for Lemmy apple has some great apps. Again I don’t think you need two devices, especially when you use profiles. But I do see why iOS is attractive and used alongside. IPads is another big use, no android tablet comes close.