The last couple times I cracked open a magazine it was 50% ads and I'm not sure how many articles were PR releases. Thinking of Pop Sci, Psychology Today, etc

Only 50% - that seems low. They were always more than that (except mad, though they did take ads latter I'm told).

I think there's been a micro-boom in prestige periodicals. Until I kind of fell back out of love with tennis, I was a subscriber of Racquet, which is a really high quality print publication about tennis (and occasionally other racquet sports).

https://shop.racquetmag.com/products/issue-no-8?pr_prod_stra... if you're interested in seeing what a very nice tennis magazine looks like (links to shop because it's the best way to show contents)