Entering Multiple Emails at once

[JACotillion]

What happened to the ability to enter multiple emails at one time when creating a list??  I used to be able to just copy and paste tons of email addresses from a spreadsheet into one box...but now it takes me SOOOO much longer because I have to import a file and delete unneeded fields, etc.  Why did things change? I really liked it the "old" way.  Please bring that ability back!!