I can sense some holier-than-thou attitudes creeping into this conversation, which I find disappointing.
I make lots of things, and I also buy lots of things.
I make points (but not plain track), buildings, signals and the memory wire actuators that make them work, couplings, electromagnetic uncouplers, landscapes and trees, not to mention baseboards and wiring. I even make wagon and coach kits, and occasionally loco kits too.
I buy locos, coaches and wagons where they are available, which gives me time (as I said in post #616 on this thread) to make the things I can't buy. I buy DCC systems and decoders, electrical switches and lamps as well.
Just because I choose not to scratchbuild locos, does that make me some inferior kind of railway modeller? I believe not.