Rulers-haven't replaced any, had most that get regular use for at least 10years
Cutting Mats- replaced 1rst lasted about 10years
Rotary cutters- have replaced for a different type but not because it was worn. Old ones still work 15years later
Rotary blades-when I have to keep going over a spot because blade is skipping(wish I would do it more often like my needles but sometimes I get lazy about taking them apart)
Pins- hardly use so still using the same ones
Needles-every new project-creates less frustration
Chairs-still on the same one unless using the dining room table
Sewing Machines- I have upgraded twice in 15years but all of my older models still run-one is 21 years old, not always a necessity to replace but sometimes just want new features. not looking to upgrade for many years now that I have my baby
Scissors-have so many pairs, all still good, some old some not( I am the ruler and scissor queen as I have TMTC)
Seam Rippers- I have about 4 pair but mostly use the one that came with my machine. They can last years, I guess replace when dull as I have no idea, haven't replaced mine