Yes, some Wal colors have definitely shifted with age. I had a maple Mk1 that in photos was a very dark purple color when new, and years later by the time I got it it had faded to battleship gray color, but you could still see darker in some edges.
As for Martin, the old Mk1 is back in his possession and he's been playing it on stage in recent years.
I remember seeing it come up for sale back around 2010/2011 timeframe, it had been converted to lined fretless but still have the dove inlay at the 1st marker and the thumb rest in that unusual position. I don't know who bought it then, but seems around 2018-ish it finally made it back to Martin and back to having frets.