Somewhere to find the latest "best practice" way of doing things (obviously need some way to sort subjectivity there though!)

For example, looking at Android there are a load of blog posts, docs and libraries but lots are irrelevant now if coming at it fresh in 2020 — it's hard to tell which are obsolete unless you've got all the historic background though.

Was thinking something à la Stack Overflow / Reddit voting might be enough to keep the best practices fresh. It's the type of thing you'd think they could cover but would likely get closed as "resource requests" there unfortunately.

Feels like a missing piece of the puzzle for me in modern web-dev, especially when moving between fields.

(EDIT: typos / formatting / clarity)