Account linking gone, can’t use my 2nd hotmail as an Alias, now what?

Account linking is gone, so I'm told to use an Alias instead.  Well, you can't have an existing hotmail account as an Alias, only creating a new one.  This makes NO SENSE whatsoever.  Now what choices do I have?  I cannot stand email forwarding, it's not a viable alternative as all new/outgoing mail from both accounts are just going to be mixed in together.  Which was the reason I had two accounts, to avoid that.