Having a constructive discussion on this forum is very difficult. The issue is lack of moderation and proper rules / structure.
I think you will find that there are almost always more people willing to tear your thread apart than there are people willing to contribute to it.
Tcoat is just a guy, he's not to blame. He's just an example of how much time one person can spend on this forum without being properly moderated. Others will spend very little time and have their threads derailed by that small group of people, and they will leave. Hence why this forum community declines rather than grows.
It's not like a subreddit where there are so many people. You can derail as many threads as you want here so long as you don't break the small list of rules. The mass posters know this well and probably enjoy the fact.
Good luck on your tail lights! If you pursue the idea