Isolate usergroups by year of registration. i.e. If you sign up in 2018 by default you end up on the 2018 user HN. Then have next to the next button buttons to

Isolate usergroups by year of registration. i.e. If you sign up in 2018 by default you end up on the 2018 user HN. Then have next to the next button buttons to go to the next/previous year. That way old people can finally talk about the zx spectrum, the commodore 64 and IBM mainframes without disrupting the more interesting hipster conversations.