people born in the 80s have unusually strong decade unity?

this birth decade rarely gatekeep eachother, I remember in the early 2010s on the inthe00s forum (you can throw in bodybuilding misc and IGN forum there too) when it used to be full of people born in the 80s, they shared memories, cultural touchstones, and gatekeeping wasnt even a thing

the ingroup hostility and things like memory-policing seem to have taken off with the mid-late 90s borns (zillennials) in the second half of the 2010s at places like personalitycafe and later this place

actually these mid-late 90s borns gatekeep eachother more than 2000s borns do (who reflect more how the 80s borns used to be 15 years ago when talking about childhood and nostalgia)

and Im not born in the 80s or later