Earlier quoted context omitted.
As far as I can tell, there are a single digit number of municipalities on the planet where two phase power is available. Do you have more details on that I can read? There's not a ton of.info on Wikipedia and I'm interested to know more.
Take a look at the https://en.wikipedia.org/wiki/Continental_Europe_Synchronous... power grid. You have three lines of 230V between each pair, and you can connect appliances with either two or three of the lines, depending in their power needs.
Almost every electrical network is 3 phase distribution, the matter under debate is if you bring every phase to each house, or if a phase reaches every third house.
Anecdotally I have never seen an electrical panel without three phases, but when I went looking it was like trying to find a source for the fact the sky is blue.