How find the release date of a product?

How do you find the release date of a product that you havent bought yet? (so not in daz studio)

Also, how relyable are these dates? When I did organize by release date in daz studio, some of the ordering looked really out of place. (like a product that I know I bought while it was still "new release" was place behind something that I bought a long time ago)

Im trying to use this to gadge how likely a figure's skin textures will suffer from the 4.8 transision where they look grey when rendered in 4.9. I know there are fixes for it, but the tone still doesnt look as good as the ones made for 4.9