I think I am probably the biggest contradiction, because on one hand I have so much of everything and could easily set up a new deck or break out a new pair of shoes whenever I want, but I keep going back to the old almost worn out things and get as much, usually too much, out of them when I probably should have swapped things out months ago. Shoes never get worn right to bald soles and are usually passed on to others I know of the same size. Decks will often be taken off and also find a new home well before they need to be just because I can, or if I am somewhere and someone else needs a board.
Every board I set up I write the date under the truck area, so when I take a board off or change things over, I can see it is usually a few months but sometimes less. The average is about six months but sometimes well over a year for a setup I haven't used much for whatever reason.
I probably shouldn't be surprised that things last so long, because I have been really only skating my own ramp and not a whole lot else for the last six months, but when I was working away a lot, product would last a long long time, but when I was home and skating a lot more of everything, boards would be swapped out more often.
Trucks, wheels, bearings all last a long time, which is good because I like the comfort of getting any of the boards out and still feeling exactly the same no matter which one I am riding, or what shoes I am in, but all brand new everything just feels so weird so I avoid that option as much as I can.