Have they flocked to the mainline churches, such as the ones in the Presbyterian, Congregationalist and Anglican traditions? Have they become Christadelphians or Adventists? Are they still around after the fusion with the Universalist Association?

I am really curious to see if there are still biblical Unitarians, that are similar to John Biddle and Isaac Newton, who have not went into the Church of God, nor to the Christadelphian religion.