Tupolev-144: Why Russia's Tu-144 Concordski Was No Concorde
The Tu-144 also failed because its commercial flights never had a significant number of passengers. The flights were too noisy and uncomfortable for people’s tastes – hardly luxurious. It only flew from Moscow to Kazakhstan, reportedly because Aeroflot didn’t want to fly over cities and risk another fatal crash that could kill people on the ground.
Source: nationalinterest.org