Fedora's tempest in a stack frame

There must be something I'm misunderstanding here; this is the first I've heard of the frame pointer compile option having any relevance to performance or debuggability since I last installed Gentoo on an i686 a decade ago. I thought it made no difference on amd64 (and I haven't personally noticed any loss of function in gdb or perf there) and that's why it's on by default in the first place.