"Thou" and "thee" almost died out in the Back Country (English Midlands) before the end of the 20th century, but you still find the occasional old 'un saying "do'[n't] let it be so long before I see thee". The complexities of "thou'thee" seem to be beyond a lot of folks these days, even the ones who don't have trouble with "I/me". I'm afraid if I ever had to spend time with quakers who said "the" all the time (when they should say "thou") I'd become offensive ...

Steve