[pants2]

I'm fully aware of Linux... It's also a very impressive open-source project. To elaborate, reason I consider Ethereum to be more impressive is the collaboration between maintainers and releases of different clients and client versions in different languages. This happens with different packages in Linux to some degree but on Ethereum it's a different ballgame because it's a live system, it's not like you can just let some users upgrade to beta versions and fix bugs as you go, everything has to work together perfectly with a system-wide change happening in under 12 seconds globally with billions of dollars on the line. There are testnets but no true analogue for mainnet. (Edit: chrisco255 below said it better)