So I got that interpretation about right? Maybe I should play a geologist on TV...

"MIDDEN", huh? That does seem to be where evidence from just about every source is converging.

Of course, there's dead and there's dead. Even with very slow wind erosion and a volcanic burp every hundred million years, not to mention ice reservoirs shifting (with associated minor glaciation) with inclination changes, that's pretty dynamic compared to our Moon.

Does that level of dynamism make Mars unique?

Do we have any other bodies do not fall into one of two categories:

1) Have totally resurfaced themselves in at least the last billion years (Venus), in some cases every few million years (Io), or somewhere in between (Earth), with processes that are still ongoing.
2) Look essentially the same as they did at the end of the heavy bombardment 3.8-ish billion years ago (and even then, endogenic processes were pretty insignificant).

Maybe Triton?