Both Kodak and Rollie made 126 cameras with interchanable lens, there might have others as well. My wife used a Rolliflex 26, she had the 3 lens, a 28mm wide, 40mm normal and short tele, 80 or 90mm. What she liked was the easy of loading, pop in the cassette shot until the end, pop it out. What was a problem was that in summer heat the plastic cassette sometimes warped. The lab we used printed 126 square, up to 10X10, color and black and white.
Agfa immediately reacted on Kodak's new cassette resp.system and revived and upgraded their Karat cassette, resulting in the new Rapid cassette plus cameras designed for it.
Technically the Rapid system was better (based on the classic 35mm film) and in contrast to Kodak it offered cameras of different formats (18x14, 24x24 and 24x36mm), thus as well square as 2/3 rectangular formats. But it lacked that foolproofness.
Agfa even gathered 25 major manufacturers from Europe and Japan around them, to break Kodak's dominance on this field, but they all failed. In West-Germany it was successful, but hardly known in the USA. Even Agfa finally cancelled the Rapid cameras, stepping-over to the 126 cassette, though still longtime making de Rapid cassettes.