I changed my original '06 rear pads about a month ago (A-Auto Wearever). After 52k miles of mostly city driving, they were worn a little more than the ones in the OPs pics. Note no squealers on the rears, OEM or replacements??
My fronts were still over 50% so decided to wait and do a more thorough job when they are due. Did lube the all the slider pins tho.
06 Laredo - 4x4 V6 - Stone White - Custom LED Cargo Area Lights, Lighted Visors Added - now at 49k miles
97 Laredo - 4.0 4x4 Daily driver for 8 years then relocated to Arizona for 6 more years with the relatives