This may be controversial, but I believe this is the closest we will get to a Super Tuesday style outbreak under the current ratings regime (5 EF4s).
In my opinion this was also the outbreak of the decade so far. You had a full on supercell outbreak in Arkansas and Missouri on Friday with an attendant QLCS north of it. Then on Saturday, while storm mode was more messy, you still had multiple, training supercell families that tracked all through Mississippi and embedded circulations later in Alabama.
Just the wide geography impacted, along with the significant and cyclical supercell production of tornados, leads me to that opinion.
Edit: to add on to this, I absolutely believe we were 2 or 3 flies in the ointment away from discussing how Saturday was the most violent outbreak since 4/27.