A list of developer newsletters
draft.dev
draft.dev
For this list, the big question, which you allude to, is "who is updating the list, and how often?". Putting together the list one time is semi-useful, having it updated quarterly would be fantastic. (Not that I'm volunteering :) .) In 2023, will this list still be good or will it be, like many other 'ultimate lists' out of date, with 25% of the entries not active?
I also think that RSS is great for notifications. I recently did a project at FusionAuth (my employer) making our software releases available as an RSS feed (previously just an web page). Got a few "hurrahs", though it seems like the most common use was to have the RSS item be posted to slack.
There's another person doing an open-source list too: https://github.com/jackbridger/developer-newsletters
So we may join forces. I'd love to have more community contributions if there's interest.