They developed 110 and its kin because modern humans became less able to manage the terribly difficult process of engaging a film leader with a spool and rewinding it after exposure. It was the beginning of our plug and play world.
126, 110 and Disc all were Drop in loading/ unloading with not much chance of random fogging. So a Win for the consumer.
110 Allowed the consumer to carry a camera in their Purse, More oportunity to capture important Moments and More exposures tor print on Kodak Paper.
Disc actually fit in the customers pocket. Even the proverbial shirt pocket. BAR CODE (then fairly new) allowed the photofinisher to dispense with twin check taps, and made possible a totally automated photofinishing flow. (the actual film has a bar coded serial number that matched the label on the Cartridge.)
The disk camera was actually the same size as the smaller of the compact digital cameras like the Nikon S3000 series so it was ahead of its time there.
Kodak also was the domanant player in processing equipment so the photofinishers would expect to upgrade the equipment for each format. Kodak was right their with modification kits for older printers.