I'm wondering if over-runs were always this common but we just never heard about them because of no internet etc. back in the day?
I get a lot of aviation accident / incidents from a buddy who forwards stuff from Simon Hradecky and it seems like at least 70% of them are airplanes coming to rest somewhere off the paved surface and it seems like it's almost a daily occurrence somewhere in the world.
Very often, they were landing in rain but the METARS don't look that bad on most of them.
I've landed on lots of wet runways in rainy conditions and I haven't really experienced any handling problems. (Except on DC-9's / MD-80's the ground spoilers would not immediately auto-deploy on touchdown like it would on a dry runway.)
Of course, I can't recall landing on a seriously wet runway or in any significant amount of rain with a significant cross-wind, maybe that would make things more interesting.
Braking action was always more than adequate.