To me platforms seem all but irrelevant relative to quantity of quality people per platform capita.
This Pub isn't much of a platform, yet I stop by all the time knowing that if there's something new, it'll all but certainly be worth reading.
(He says, wincing a bit over having used "all but" in consecutive sentence....)
I agree. I've realized things like Hacker News bring me the most joy and value, while still allowing me to be mindful. That's the only thing I check regularly anymore simply because it brings me joy and doesn't suck me in.