Write a list of all the things that Apple is good at, what have they got in common? Absolutely no cloud service involved. For some reason Apple has the reverse Midas touch when it comes to cloud services, everything it does turns into brown smelly stuff.
Latest example of this? Apple Music. Here's a service that Apple has spent a lifetime preparing yet still hasn't managed to get right. When absolute dyed in the wool Apple fans, for whom Apple can usually do no wrong, suddenly start moaning about a new Apple service you know something is very wrong.
As it is, Apple Music seems to be randomly destroying customers carefully curated music collections. A similar theme has run through anything cloud since Apple decided to mangle photo collections with iPhoto.
Right now Apple is sitting on a huge pot of cash and it has a technology that it hasn't been able to work out. The logical answer would be to find a company that 'gets' cloud services, buy them and use that expertise to fix the woeful mess that is iCloud, and as a result all the services that Apple hangs off it.