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On the overall question issue of bike fit I've only got back to cycling in recent years. I quickly concluded that a Dawes Galaxy with drop bars wasn't the right fit as being down in the drops hurt my neck so, since then I've been using flat bars (currently favouring the Ergotec AHS bars) but I am still making small adjustments to the bar height in order to establish how low I can get the bars while remaining comfortable.
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Years ago I detested drop bars, I found using the drops to be very uncomfortable. But after I lost 15 percent of my body weight, much of it in the abdomen area (or beer belly), I found that drop bars were much more comfortable than they previously were. Now use the drops maybe 30 percent of the time, mostly with headwinds or at speed on shallow downhills.
My dad has a rather nice Dawes Ultra Galaxy with drops, which when trying it first a few years back was uncomfortable partly because I was carry significantly too much weight. Beer belly might have been an understatement in my case. 30+kg lost in past 2 years, I spend a few weeks caring for my elderly parents and tried to ride 10+ miles most days I was there using the Ultra Galaxy once more. This time the fit (minus belly) was now far better.
I have bikes with both straight and drop bars, though currently that's 3 to 1 (Not including folders or E-bike)
I think it's often a case of familiarity, or another case of forming opinions based on limited experience. There's many varieties of both types and I doubt many of us have more than scratched the surface of what's available, I certainly haven't. I've found something I like and stopped trying anything else, in my case fairly straight bars with Ergon grips and Nitto Randonneur drop bars. There isn't a huge difference between them in my most used positions, the Ergon offer a position similar to the hoods, and the position on the grips or flats is similar. The only difference is when looking for an aero position, in the drops or the ends of the bar ends with wrists on the grips. Aerodynamically they're very similar, I prefer the stretched position of the latter to the hunched position in drops, but again familiarity may play a part in that. I think the idea that drops are inherently superior in this regard is a myth, for evidence look at any TT bike, or at a random selection of cyclists the majority of whom would probably be more aero if they bent their elbows, regardless of the shape of the bars! Many off the peg drop bar bikes will come with a greater drop from saddle to bars than the equivalent straight bar bike, it's fashion. There's no need for that to be the case. if a 15cm drop suits the rider it will regardless, likewise having the bars higher than the saddle.
I've now had a proper read of the Zinn article, as noted it's very much from a racing/sport perspective and the changes he's made are quite considerable. I haven't considered changing my position, I'm comfortable where it is, but it was never that sporting to begin with. I note the position over the pedals hasn't changed, this is the only consistent between my bikes. The reach differs between them, by up to 4cm from memory, that's been arrived at on a bike by bike basis, to some extent it differs with usage. IMO, for me at least, if I'm comfortable over the pedals, the bar becomes somewhere comfortable to rest the hands, and that's quite a range. If that wasn't the case where would you set the bars for? There's a greater difference between hand positions on any of my bikes than there is between bikes.
The only bike I've struggled a bit with comfort on is the E-bike I bought last year for delivery work. It is a very stiff frame, it needs to be, I added a suspension seatpost which helped. But I've come to the conclusion the major difference is weight displacement due to effort. It's riding for work, not for fun, I'm trying to minimise my effort! So, I'm very much sat on rather than in the bike, extending that idea to the Zinn article, it isn't surprising that a rider putting in maximum effort would have less weight on the saddle and more forward on the bars, making their position more critical.