There's a lot of good info on IH, but unfortunately a lot of it gets buried. The reason is that conversations take place on broad-topic boards which go on for thousands of posts.
In a thread-based architecture like the one on FF, there are many short threads, each of which deals with a specific topic. It's a lot easier to find old discussions about a very specific thing, because those discussions are encapsulated in single individual threads.
It's like the difference between being in a small focused seminar room vs. being in a large crowded auditorium.