Some businesses are not about innovation, some businesses are about margins. Personal cloud storage is that business - people shop around and buy on cost.

I use OneDrive because it's free with Ms Office, which I need anyway, and their 'family plan' pricing is great. I decide cloud storage for like 5 accounts, backups of family photos, etc.

That is in spite of the fact that dropbox is miles better, and has extra features - they dont move the needle.