I find it strange given that all his records have sounded exactly the same for 20 years.
Oh, I feel sorry for you! Do you really think that all of his work sound the same for 20 years? Not to me!
Even after many years of listening there is always something new to discover.
Have you ever listened to all of the great bonus tracks? I'm sure you did. Aren't there any gems to discover?
For me all of his albums have a different sound. I don't think Tracker and DTRW sound the same or Shangri-La and Get Lucky. Just to name a few.
They have all Mark's distinctiv touch but have all its own character which makes them worth to listen very intensly.
I think Mark has never stopped being interested in new things, you can hear it on every album.
But if you look deep inside it's all his distinctive sound, lyrically and musically. Pure Mark Knopfler! And that's what I like. I don't want him to sound different!