A company like home depot or kelly moore paints would have a tough time relying on open source for all their operational software. For vertical software system

A company like home depot or kelly moore paints would have a tough time relying on open source for all their operational software. For vertical software systems, probably. For applications developed in-house, I'm guessing that even at Home Depot or Kelly Moore it's the other way around -- more and more, you have to make a good case for using a proprietary library. The connotations of "open source" have changed somewhat, and open source libraries are becoming the norm, even at large old-school software businesses, where the lawyers hate open source.