3DES? I guess. People banged on it a lot more than IDEA, which is good, even on your worst days banging on things has potential to shake loose anything poorly put together. But as a "path dependency" I think it might teach an even worse lesson than RC4 did.
Edited: Sorry the last sentence was garbled nonsense originally, maybe it's the heat here. Or my brain is gradually deteriorating :/
I don't see how that could be the case. The major problem with DES-EDE is shared by all the 8-byte-block ciphers, and the fix was simply to upgrade. The problem with RC4 is much more fundamental.