I like old yahoo mail better after giving new yahoo mail a solid try for a few months; I still have the same issues I never got over not having in new yahoo mail. Maybe these issues are not important to other people, but they are to me, which is why I returned to old yahoo mail.

Old yahoo mail is more convenient in 3 ways because I:

A. can see all folders at once, or hide them if you want (new yahoo mail you need to click on Folders tab for folders to show)
B. can see spam and trash folders all the time (new yahoo mail you need to click on 3 dots to see them)
C. can see archive all the time (new yahoo mail you need to click on 3 dots to see it)