In my County the UCC has lost five congregations in the past decade; three of them since the decision by the General Synod to advocate for gay marriage.
One of the congregations went totally independent; one became conservative Presbyterian; one to the Reformed Church in America; and the other but most recent two to the Evangelical Covenant Church.
ALL of those departing congregations were founded prior to the American Revolution.
Interesting
My church’s history dates back to the 1600’s. I wish they would leave the UCC. I liked them much better before they joined.