Community resources: Focus on what's Evergreen vs. what's New

There's gonna be some irony here because I am quite interested in putting together my own Planet sites like Planet Python¹ (my first one is Offbeat Planet), where the most recent items published by people in a particular domain or community are pulled together into one, public place and presented in an easy-to-skim-through feed. They give an idea as to what's going on in the world ("planet") of that particular domain/community.²

Planet sites are generally quite great and useful resources for a community of interest to cultivate and use, especially for helping new members/people not terribly immersed into that space get exposure to vetted sources of information regarding that space and to stay on top of developments within that space without needing to search out info all the time.

Even so, they have a ton of noise: some entries can be much lower quality than others, many entries are just reactions to some recent thing that won't matter in a week's time (especially if there's some sort of speculation going on as to if/when something will happen), some entries end up being pretty much spam/advertisements, etc.

What's new isn't always the most important or useful. Indeed, I'm tempted to say that new things usually aren't the most important or useful.

It's definitely useful to have or provide a means through which you and a community that you're a part of can decently assess what is new and changing within that domain. However, I suspect that it's often the case that the more valuable resources are those that have proven themselves to be good, useful, and important, often over a longer period of time than whatever was posted in the last week or so.³ Meta-resources that curate and make such good, useful, and important resources easily accessible/discoverable are far more important and useful than those that just pull together what's new, unproven, and more noisy.