This is just an afterthought, but I'm wondering why Joni didn't choose to change this line ("the last time I saw Richard was Detroit in '68 and he told me...") from T'Log to a more recent date (i.e., "Detroit in '88" or maybe "Detroit in '98." However, "Detroit in '78" certainly wouldn't/doesn't scan right). I mean, back when the song was originally released (in '71), the "Detroit in '68" line would have been only 2 or 3 years earlier, rather than almost 35 years ago. I think with the update, younger fans could have related to the immediate sentiments a bit more, rather than what must seem like ancient history to many.
The only legitimate reason I can think she might argue against this change would be due to the factual dishonesty it would express (especially since it's such a direct and specific personal reference). After all, she made several other changes in lyrics---apparently without blinking an eye. Any thoughts and/or opinions on this? BTW, I'm finally beginning to really did T'Log---particularly STBethlehem, YDFlat Tires, BCool, TDawntreader, TCGame, WStock, GMBABoogieM, and O&Marlena (among others). Personally, I still think it's a bit bombastic and over-blown at times---and I could also do without the relentless input of Wayne Shorter---but over-all I feel it's a very successful, impressive and ambitious project (at least on it's own terms), and I would never seriously presume to second-guess the great Joni Mitchell. ;-) XXXOOO, Billy