The pace slowed down a lot, but he was still putting out books into his 80s.
He was still a radical within the church in the 90s, but twenty years later his views were so widely accepted within - while trad/conservative churches ignored his heresies. So not many appearances on Donahue.
For all his efforts to bring Christianity into the 21st century, by making it relevant as a social movement and removing a lot of the ‘magic’ - I think he failed to predict a generation of young people who wanted all the spiritualism and theism: yoga, occult, eastern religions, Norse shit, etc. As far as socially active, radical Christianity, the Episcopal church has definitely moved far to the left but hasn’t done much better than anyone else in attracting younger generations. The biggest lefty churches for young people are new and evangelical.