The trouble is some people want all of the following on one bike:
lots of seatpin exposed therefore a low top tube,
drop bars positioned high to very high , (my definition of "high" is level with top of saddle),
a racing bike or something similar to a racing bike.
That simply cannot be acheived on a bike with a horizontal top tube, at least not without it looking like a dog's dinner!
In pre-compact frame days, if you wanted highish bars, like on a touring bike, you would get a slightly bigger frame so the head tube's a bit longer so you can position the bars higher, prob with the quill stem at the max height. Even then, the bars will not be much higher than the saddle if at all.
I'm only talking about what used be called "lightweights", ie bikes ridden by enthusiasts/club cyclists etc. Bars at the same height as the saddle will give a fairly uprightish/semi-crouched riding position, in between a racing crouch and an upright position. If you want an upright position, it might be better to get a sit-up-and-beg type bike.
Remember, compact frames were introduced so that maufacturers only had to make frames in 2 or 3 sizes instead of ten or more. Compact frames are practically one size fits all. that's why they *look* crap if you are used to seeing bike from the 50s to 90s!
In the end it's what you're used to. Bit fit is the relative position of the pedals, saddle and bars, how it's acheived is mainly arbitary, although frame geometry does affect handling.
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Because like a few others, I too very much prefer the look of a horizontal top tube. And I have a bike which has one... which, when built up to come within a reasonable range of fitting me, looks like this: http://velovoice.blogspot.co.uk/p/surly-cross-check.html
Ridiculous. Who can possibly appreciate the beauty of a horizontal TT when there's 8cm of spacers sitting over that headtube??
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I could be wrong but that looks like a sloping top tube.