Do Managed Local Accounts Remove Need For Multiple Domain Accounts

I cannot get a consistent answer as to how many domain accounts would be suggested in a SQL Server 2014 installation. Previously the recommendation was a separate account for each service to provide isolation and minimum permissions for each account. It seems from what I've read that a single domain account would have something added to make it unique from SQL Server's perspective. Several still advocate multiple accounts. I don't know if they are doing so because that's the way it's always been done or if there is still some compelling reason to do so. I don't want to create unnecessary accounts simply because something is "ideal."