Even for others though the wheels on different chairs will be different meaning that it’s hard to make escalators that grip any surface.
As such each has it’s definite place. You should get elevator engineering if you want a way to change floor in an office or in a hotel simply because of the space saved. At the same time you might prefer this in locations that don’t need big trolleys, or that don’t require the regular transfer between floors of lots of people. For department stores though or supermarkets, an escalator with a sloped mechanism becomes much more practical.
However if you can, installing both is preferable and you should get both elevator engineering and escalator engineering. This way you can offer one for disabled access or more private travel and the others for the masses and their trolleys. It also means you have a backup for anyone should one falter.
