Why SCARA?

I don't understand what 3D printer design solution results in a SCARA design?

Seems to me it is just neat.

What design requirements drive to a SCARA solution?

What are advantages / disadvantages.

Perhaps it can 3D print --- then weld up a car ---- paint a car
--- pick and place all the electronic components --- then load eggs in a carton?

Why not ?

Each machine geometry has its own benefits / drawbacks.
For some guys the cartesian geometry is easy, simple, reliable and well known.
For other guys there is some kind of SCARA geometry which fits their needs more closely.

I started mechanical design of a dual arm SCARA because for me it has the following benefits:
Low part count.
No linaer rails, belts, spindles,....
Low footprint area.

Drawbacks are:
No linaer rails and therefore curved trajectories.
Nearly no firmware.
Arm droop.

There´s much more, but sometimes it´s only one crucial point which defines the geometry which will be used in the end...

BR
Mike