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Reddit is a Dying Mall
(www.staygrounded.online)
This is a most excellent place for technology news and articles.
mander.xyz is awesome, if you select by local you only get science posts from communities that are visited and commented on. programming.dev has some good communities too, that probably need some good comments and content so people don't give up on them.
You need to pick your home instance well to have a good head start, otherwise, you'll spend every day blocking communities that take up space in you discovery feed when you select by "all".