16 years of the same system, time for change?

maybe

No

G

Depends on what the OP has now, and whether the sound has been superseded by current offerings at or below a certain outlay of cash.

If the OP has top of the line gear that cost $20K plus, probably not.  However, cables get old and oxidization in the cables and at the connection points degrades the sound.  Simple maintenance with Deoxit may be all that's needed.

213runnin... there is merit to your comment. Prior to your comment I went and found some Squalin oil I bought a billion years ago (ok figure of speech) and wiped all connection down.
To say an improvement was not garnered would be a lie.At this point I now believe the cost to make a significant sonic improvement would be beyond my means.