Eh, I think the success of the DVD and now Blu-ray formats show recording isn't essential. As the article notes, this format, and I'll note another format in Japan using a stylus over a bunch of holes, failed in the face of VHS and Laserdiscs.
Cassettes won in part because they were a lot smaller and could eventually play stereo, and 8-track tapes are a terrible, fragile kludge (my family used to make them back when pirating them was legal, as long as you paid ASCAP ... or tried to pay them, they never accepted the money my father set aside).
