I think even Reddit can be "high SNR" depending on the sub reddit. Some subreddits dedicated to specific topics like (eg. compilers, webdev, machinelearning etc

I think even Reddit can be "high SNR" depending on the sub reddit. Some subreddits dedicated to specific topics like (eg. compilers, webdev, machinelearning etc) provide updates on industry trends/practices, interesting projects/ideas/papers and you can ask for help for issues you face. Though I do agree that it can be a time sink and not really productive as much as browsing makes you feel.