The insecurity and potential compromise of serious and exploitable “mis-feature” in a browser (causing the browser maker to suggest using a competitive browser platform), or the security theatre at all of the banks we deal with who write their web pages specifically for that browser, so that no other browsers will work properly with it, regardless of platform, and whose representitives insist in meetings with you that they are indeed secure … see the little lock they ask me derisively?
ummmmm …. yeah.
Security theatre is more frightening to me. There are no monsters under the bed. Or killers in the closet. Or thieves on the network or in your bank. Nope, none at all. See the little lock? That means you are safe. Ignore the cracker behind the firewall.