Indeed. The only sane place on the internet to get answers to a range of deeply technical questions about modern tech (or, at least, a discussion that will get you closer to the answer) I've found is IRC. It's filled with a lot of "old tech guys who have been doing this forever." And, often enough, that's who you need to make sense of some bit of architectural manual arcana.

Discord is awful. It's most of the downsides of IRC, with all the downsides of a centralized company running it, with a very resource heavy client. You can run IRC on just about nothing (I ran an IRC network in college on a 16MHz 68030 with 8MB RAM just fine), and I know quite a few quiet little backwaters servers doing exactly that.