Forum users tend to buy the Pro, or in this case, the novelty. This forum typically features yearly upgraders who are not typically satisfied by base models.
I would buy the regular 17 if I hadn’t upgraded to the 16 Plus from my Xʀ still running iOS 12. And I only bought the 16 Plus over the regular 16 due to battery life and screen size.
I think it is the best overall package. I am not interested in compromising anything for thinness, so I would not consider the Air, and the 17 is the best base model iPhone ever. Battery life is significantly worse than the Plus, but significantly better than the Xʀ, and truth be told, I don’t need the Plus’ battery life. I bought it because I liked it.
The 48MP Ultra Wide, the battery life, and the larger display over the regular 16 and the Xʀ would all be very compelling reasons to choose the regular 17 today for me.
Like I said, I think it is the best base model ever released.