depends on the subject matter, hypersonics, combat systems, +gen combat air systems, compound armour.... he's the manHe tends to appear when the conversation gets interesting, averaging ~30 posts per year over the last 10+ years. Dated, its a relative term, the items being discussed are often 30+ year into the future for mainstream. Just be cause the posts may be 3 or 5 years old, doesn't make them any less accurate. I still go back an re-read his posts from years ago when I have an interesting line of thought about a particularly cryptic post.
There are other knowledgeable members.