You're wrong. Even without any mining, running a full node requires 2GB of RAM. Even if you do less than a full node, you'll find it hard to fully process 100x transactions on less than 2GB.
Also, you don't seem to understand the point of PoW.
He's talking about running something that does bitcoin, but without the inefficiencies of PoW. I pointed out that the RPi 0 doesn't have enough power to handle that scale, even if we took out the PoW stuff.
