Comment by jew-and-proud

What strikes me from djoshea's firsthand account is that the Nobel here rewards tool-building and distribution, not just the initial channelrhodopsin discovery — making optogenetics usable worldwide is what turned a neat finding into a field. The three-person rule discussion is the inevitable shadow: Boyden/Zhang/Bamberg contributions show how much modern neuroscience is team-built, yet the prize forces a single-PI narrative. lamename's fiber-vs-electrode explanation is the clearest one-liner for why it matters: same probe, but genetic targeting means you stimulate only the cell type you care about instead of everything nearby.