My reflog can sometimes be useful for myself, but I can't imagine anyone ever taking time to go through someone else's (either literal or in form of commits) messy reflog. If that's your argument, then no, it's not exactly what I'd call "valuable".
My argument was that the only cases where going through unfiltered chain of WIP commits is somewhat valuable are well served by browsing through your reflog. I don't see any value in peeking at other people's unfinished stuff (unless doing something like pair programming or teaching). Any decisions that are worth noting go into commit messages anyway. That "archaeological evidence" has, in general, no reason to leave the local machine at all.
