I've built Anders Pink (https://anderspink.com https://anderspink.com) to help with content discovery. It allows you to follow topics just by entering a search

I've built Anders Pink (https://anderspink.com https://anderspink.com) to help with content discovery. It allows you to follow topics just by entering a search term, or by creating something more specific (e.g. must contain term X, but not term Y). New articles get pulled in every few hours, and get emailed to you every morning in a digest. It also allows you to pull in content from rss feeds, then filter it. There's boards to save articles to, and team features to allow collaboration if needed.