Didn't mean to stir up any controversy, just wanted to hear what the Rebbe thought about this.
It's a touchy subject with various interpretations.
But at any rate, there were times the Rebbe encouraged the creation of an eruv, but for it to be a secret so that people don't rely on it. There are also times the Rebbe said to build and not to build an eruv, with various differing factors in play.
Notably, Kfar Chabad has an eruv which was supported by the Rebbe.
@ExGingi likely has more insight than I do if the locals use it.