[Graymatter]

It's a metaphorical use, which is about the best that Magna Graecia can get these days. Even the real MG was just a constellation, so to speak, a perceived nation, actually the legally disconnected colonies established by Greeks and bearing Greek culture far from the homeland.
Nice to hear someone mention MG, even metaphorically.

[Heatseeker]

I took it too literally I guess. I certainly agree it's nice to see Magna Graecia mentioned under any circumstances. Interesting that some of the stuff on the Internet about seems to include Sicily, which I had never heard associated with MG though it certainly had Greek colonies.