My main problem with iCloud is that when I first started using Apple products, I used my own email address as my Apple ID. Later I registered a separate Apple ID with my desired username @icloud.com when they became free, but before it was possible to create an @icloud.com address on your existing Apple ID. Now it's impossible to merge these two and I don't really want to dig myself into a deeper hole by creating some randomword@icloud.com on my primary Apple ID just to be able to use the iCloud+ custom domain feature.
After reviewing this thread, iCloud+ is top of my list for migration, and I don't even own an Apple-anything. (Migadu is my secondary choice if this iCloud+ thing falls through for some reason.)
From what I've been reading iCloud+ has some limitations, but it will fit my needs. An iCloud+ subscription costs $1 a month ($1.29 CAD), and the subscription can be shared with a "family" of up to 5 other iCloud accounts. iCloud+ supports up to 5 domains and three email addresses per domain per person. Domains can be shared between the family or not. I also trust Apple to have a competent security team.
