If you walked into a bike shop in 1981, with no prior thought of what you really wanted, and said; "I'd like to buy a bike" you would have walked out with the bike on the right.
The ubiquitous "ten speed."
Why? Because that was the style at the time.
And if you walked into a shop in 1991, with no prior thought of what you really wanted, and said; "I'd like to buy a bike" you would have walked out with the bike on the left.
The Mountain Bike.
Why? Because it was the hot new thing at the time, and also because people realized that it was a lot more comfortable for just average riding.
But, what if you could get the speed on paved trails with the comfort of the mountain bike?
If you're going to mash the two disciplines together, this is the way to do it.
This is not the way to do it;
You'll find this kind of thing in vintage circles because back in the day, riders were still experimenting. They had been on drop bars for so long that it was hard to switch. It wasn't hugely popular though - the Specialized RockCombo was the only mass-produced bike that I know of.
And back in the day, the guy across the street from me had one of these. I remember thinking it was really cool, but today, I'm wondering what the hell I was thinking. The drop bars hinder it's use as a proper MTB, and it's puny 26" wheels make it fairly hopeless as a 'cross bike. So, why exactly would you do this?
Possibly the most famous user of this setup, was John Tomac.
Tomac was trying to break into road racing, and had signed with 7-11. The magazines at the time reported that his 7-11 coach allowed him to race mountain bikes as long as he ran a drop bar to maintain his riding position. It made sense at the time, but honestly - is that not a completely ludicrous idea?
MTB and road racing have virtually nothing in common as far as the bicycle/rider relationship is concerned, so how does making Tomac less competitive on a drop bar - and really, we know it wasn't making him better, because nobody else did it - help him to be a better road racer?
I'm willing to bet that secretly, the 7-11 coach knew that drop bar would hinder Tomac, and hoped that it would do so so much that he'd quit MTB racing. Or, he'd do what actually happened; he quit road racing in 1991.
"don't see the benefit of looking that ridiculous."
So much for that idea.