My site is media e-commerce 17 years old, growing rapidly since I've added pagination to categories for mobile users. March-april on 2020 was amazing and after the 4th of May, it decreased by 15-20% every update; finally, after May 26th, it was 30% off, so for two years, it fell from 20k to 5k. Very competitive niche, with tons of free sites (not adult). 100/100 page speed.
So, pagination was changed to Ajax loaded ‘load more’ pages; some pages were rewritten with the scheme 5-7 top asked questions and 70-120 words answers, ai generated, manually edited, links were purchased on top pages and main page.
+15% up overall after this update, pages with a good link profile and rewrite gain 10-50%, rewrote but without links not gain at all.
Imho, google doesn’t want to spend time on hundreds of pages 2, 3, 50, and 90. Answers on topics should be correct, easy to understand, and helpful. Long reads are great, but not for every niche, site, or theme.
Content edit is a never-ending story similar to what wiki does; you need to add more links after each new edit - it’s an indicator that improvement was good and valuable.
Returning users is the most critical thing, and you need to do some magic for it.