Ask HN: What communities exist that are free from self-promotion?

I generally do a lot of reading online but I've slowly started to question my sources.

It's becoming increasingly difficult to find community without wading through the endless embedded ads and outright self-promotion or the culture of "whatever you're doing, it's not enough."

Thankfully, HN has remained pretty steadfast as a higher signal to noise community or at least that's my perception. What other communities do you frequent that have a higher signal to noise than most?