I do not think that can be determined in the tech space with ‘age’ alone. Popularity, usability and performance are much more important factors.
It was already brought up in another comment, the gtx 1000th gen, is a nice example. The gtx 1080 is after 8 years still a valid GPU to use in gaming and the 1050 a nice little efficient cheap video encode engine which supports almost all modern widespread codecs and settings (except AV1).