The third console curse: Which was the biggest stumble?

[Leynos]

Soundwave said:

Leynos said:

That was a Sony thing for a while. Mini discs used the caddy. UMDs and the earliest versions of Blu Ray used a caddy.

Lots of CD-ROM from the first half of the 90s used a caddy. 

It was honestly not a bad idea, would have also made piracy much, much more difficult. 

Famicom Disk system also had games come in a plastic caddy (rather than a floppy disk design)

Well, Famicom didn't use CDs. They were diskettes. Just magnetic tape data. First console to use CDs was the PC Engine CD add-on.