DSLreports used to be such a great resource for all things IT/telecom. Seems like Reddit has most all message board traffic these days, but many topics appear lost in the mix there.
DSLReports was definitely a unique resource and many users still miss the depth of discussion it offered. While there isn't a perfect one to one replacement, communities like ServeTheHome forums, Reddit's networking and broadband groups and some ISP-specific forums have become popular alternatives. The best approach is often to follow a few niche communities rather than relying on a single platform.