@RadioAzureus @RL_Dane never experienced Jaz/jazz so I can't speak to it, but SyQuest's "EZ" removable platter cartridge-based systems were a nightmare. Sure it was nice portable storage but holy crap the issues w/it back then. Single spec of dust & the whole thing was ruined. Swapped in a 300MB quantum in that SCSI enclosure eventually.
ZIP was downright reliable in comparison. Really never ran into much click of death issues (at least back then, and don't have it now so can't speak to today).