Well, I'd reached polysaturation at 3, and I was pretty overwhelmed by keeping those three relationships going with the intensity that each of them contained. I didn't really get used to it - but I sure as hell felt FULL.
As for communication style, Ella and I only speak by phone and by typing (doesn't matter what medium), while Amy and Willa and I saw each other pretty regularly, but also wrote a LOT during the intense periods. Saturation was fully present when I was spending what felt like most of my day writing inside the relationships, interacting, working through things, and so on. It was pretty damn intense for a while.
Willa: my wife
Amy: someone Willa and I have both been involved with
Ella: a many-years long-distance relationship of mine, that I don't blog about