In 1954 an industry was born. People choose Central Vac because it does a better job. It's as simple as that.
More power is the key.
Because the Central Vac is mounted on a wall, unlike portable vacuums, there's no size or weight limit. The motor can be, and is, much more powerful. Added power means you clean deeper. You remove more dirt and dust, and do it faster. Other companies use the name CentralVac to describe their products.