Why don't we ask what's different about the VAG filter (ie get some more facts), rather than argue about whose right or wrong re expiry dates?
It's plausible that filter material subject to humidity and temperature fluctations could become compromised. Rubber seals, adbv etc could become less pliable. Metal could rust.
So does the VAG filter have synthetic media? Are rubber parts made out of silicone?
Arguing logicaly with facts and even supositions that can be challenged is helpful. Arguing solely about validity of sources of information and who you trust is not a precise enough way to come to any conclusions.