Hacker News Reader

This site says it links to 1700+ forums. Seems to be experienced and fairly-well organized. Recognizes 'niches' up-front.

https://www.findaforum.net/

'Search' is not so helpful at specifics (topics), one size does NOT fit all, the universe is too big ...

View on HN

Big-boards used to list the biggest forums and I think it would be relatively simple to recreate it using ml and web scraping. Someone more knowledgeable than me probably has a better idea of how to do it:

https://web.archive.org/web/20130517185302/http://rankings.b...

Reply on news.ycombinator.com