Unitarian Universalists were early adopters of websites, and even in the late 90s I remember more than 300 or 400 congregations hosting their own site. These earliest available archive is from 1996, with 234 sites and more coming on line all the time.
I also recall — and thinking it wrong then — that someone-in-the-know opined that it was unlikely that many more churches would bother with one. That must have been around 1998 or 1999. (I wish I had written these predictions down. It was, of course, pre-blog.)
Today, only 36 of the 1045 member congregations of the Unitarian Universalist Association report no website. Most of these are very small (median membership = 11) and are overwhelmingly in New England.
The largest one listed (111 members) is The Unitarian Church of South Australia, but it does have a site, apparently for years.
But that’s not to say these other congregations don’t have a web presence, and that their choice isn’t the best one. But that — and a table! — is for next time.