DK
this is from the old preamble of AA
We feel that each person's religious views, if any, are his
own affair. The simple purpose of the program of
Alcoholics Anonymous is to show what may be done to
enlist the aid of a Power greater than ourselves regardless
of what our individual conception of that Power may be.
I think it would've been great if they had kept it, although the sentiment is still very much the same - and certainly in the UK, where I have never heard a meeting end with the Lord's Prayer, though I understand it's pretty widespread in the US (and if I was at a meeting where they did do it, I would recite along with gusto!).