- it’s impossible to search chats meaningfully, whereas forums/DLs let you quickly figure out if you’re facing a common issue (and finding resolutions easily)
- asking about something in chat and tracking replies a day or two later (because you will quite likely not get a quick reply to complex issues) is also quite hard unless you just happen to be awake at the same time as a core dev and can actually spend the time together (although that usually devolves into “file an issue with more details and tag me”).
- I don’t want to sign up for a dozen different services or private forums to even access that info.
Not to mention that (depending on community) you might just get a lot of irrelevant chatter thrown in, or just plain “this is the wrong channel” replies because there are no signposts.