You're misreading it. Only some parts of the free tier "age out". Other parts of the free tier are free forever (it's really stupidly confusing). The things announced in this announcement are free forever.
It's stupidly confusing because the regional transfer of 1GB free per month isn't technically part of the "Free Tier" as advertised on this page [0], it's just part of the normal egress pricing model of the individual services [1] [2]. So I guess really this announcement post is misleading/confusing because the regional transfer increase is just a change in the normal pricing model, not the "Free Tier"... but really that's just semantics. AWS really needs to fix the "Free Tier" to make it less confusing.