Twitter account @WrestleVotes has an interesting stat regarding The Usos and WrestleMania 35:
Correction: The Usos are on pace to make history at WrestleMania 35. They will become the first team to walk into WrestleMania as Tag Team Champions 3 years in a row.— WrestleVotes (@WrestleVotes) 13 March 2019
They will pass 2 teams who did it twice (Money Inc 8-9 / Dudley Boyz 16-17)
Demolition did not do it twice.