I've worn out my Shimano R320 shoes. The uppers have held up well but the rubber nubbins on the soles have worn down and are not replaceable, and the ratchet clasp on the main strap has weakened to the point that it slips loose as I ride.
Meanwhile, the Speedplay Light Action cleats fitted to them when new are pretty worn, with one bolt missing and the others so worn down they'll have to be drilled out if I want to recover the blue wedges between the cleats and the 3-hole-to-4-hole adapter plates.
My immediate inclination was to buy exactly the same again... only to find that the R320 shoe has been discontinued in favour of the latest incarnation, the R321 which, unlike the R320, does require heat molding to the feet. I'm not inclined to go down that route -- after all, feet swell and even change shape throughout the day. (And... it's really difficult to find the all-black colourway in stock!)
So I decided to step back for a re-think.