I have found myself that I often reuse functional stuff(I write functions to do stuff and continously add fucntions in different programs that kind of belong to

I have found myself that I often reuse functional stuff(I write functions to do stuff and continously add fucntions in different programs that kind of belong together and then I realize I have a library) but I rarely reuse class-oriented stuff. Sure sometimes you have a class that can be used in many programs but I dont find it happening that often. Seems logical as well, you reuse your hammers and screwdrivers, not your house.