I think that while Reddit's primary use is link aggregation, there's a secondary use for getting really niche questions answered by members of niche communities.For example, I have questions and answers on subs like r/powershell & r/xcode that still get replies years later because they solve a very specific problem.

A lot of communities are choosing Discord for their homebase location rather than Reddit, which really bums me out because I'm not a huge fan of public Discord servers and I miss seeing the posts from all the niche communities I'm in aggregated somewhere.