To provide another opinion: Apple does this to, .mac, .me & icloud oh my don't forget about the iTunes account now.
In case you are wondering I switched my household, parents and several friends to apple products since 2002 because it was easier to provide help.
I sometimes wish there was a magic button I could push to merge everything into a unified single sign on for <insert company name here>'s products. It took a while but Google did it in a weird way that didn't make me very happy either.
Oh yes, Apple is a serial offender too - my iPhone is stuck in a world where the iTunes store account and iCloud account are on separate apple IDs, and I've got no idea how they relate to the email addresses I can be reached on facetime through. Neither of them are associated with my apple developer account, either. I'm sure this identity stuff shouldn't be so hard.
In case you are wondering I switched my household, parents and several friends to apple products since 2002 because it was easier to provide help.
I sometimes wish there was a magic button I could push to merge everything into a unified single sign on for <insert company name here>'s products. It took a while but Google did it in a weird way that didn't make me very happy either.