I was always under the impression a full synthetic filter would have to be wire backed because the fibers cant stand alone.
From my understanding, Mobil 1, Bosch D+, P1 and TG are all examples of blended media filters.
Oil and filters dont seem to care about age whatsoever. As said, just allow to get the oil hot on a regular basis and you will be fine.
***With my experience, I removed a Mobil 1 filter off my dads Jeep truck last spring which looked great. No waves whatsoever. It was in use for about 5 years. I know this because he had to special order the filter at Oreillys, but they accidentally gave him a case of 12 rather than 1. (They are the older styled Mobil 1 box too.) The parts guy said he could go ahead and have the case for the price of 1 filter. We not have 10 filters left since I used one last spring for the last OCI. The oil maybe had 5k on it in that time.. Whenever he gets it out, it sees nothing but highway miles to the lake house.