Is the flip flop sandals on guys a fad or is it here to stay?

Flip flops on guys have been around forever but during the past few years a lot more guys are wearing them, sometimes when it is so cold or wet you almost think the guy is desperate to fit in. Do you think flip flops on guys to the extent it is, is a fad?
Personally, I hate sandals. Your feet get dirty, you can’t run in them, your toes aren’t protected, they normally don’t “go” with athletic shorts (more appropriate for dress or walking shorts).
Uggs on chicks are sort of the same thing. You can see a guy in sandals with his girlfriend or wife in Uggs on a 40F day or a 95F day – one of them is not dressed right.