Yes, I think so in the sense that it peaked several years ago. For awhile it was getting smarter because so many niche communities were being created and good information was being shared freely, which attracted more expertise. More companies were also interested in using subreddits as their community software or support forum which endorsed sections of it for specialized knowledge. Those trends have peaked and companies are more likely to set up a Discord and create nice documentation as static sites have become easier to generate and GitHub mindshare has grown.