I agree and I'm the same way, to a point. I am still using tools that are decades old on a daily basis and I save most of my old ones for parts. I also, unfortunately, have a bunch of tools that I intended to fix that have been sitting for years because the parts cost as much or more than replacing the tools. I wouldn't keep using that microwave without replacing the faulty switch because it's a potential safety hazard and I wouldn't leave my nice new A/C units in the shed to collect dust, mold, etc while using the old inefficient ones. Put the old ones up on free cycle or something so someone who can't afford a new one can use them(win/win).