With all that in mind, the only reason adventure bikes don't resemble something like that is because they only get sold and are popular because they market an ideology rather than a bike. The BMW/KTM Adventure lines are great touring bikes, but that's inspite of their marketing and design compromises made to fit that marketing. Looking at the use cases that 95% of ADV riders have, they'd be a lot better off with better rubber, better electronics, better brakes, and suspension travel designed for street use, not "offroad?" use.
You're on the dot, Z3n. But we know most people are more likely to buy when they are emotionally engaged. We all have heard a saying similar to, "In case we want to, we can go there.", even if it only happens once or twice in one's life. Of course this is supported by one's ability to afford it.
Multistrada continued in making a more sense bike, more of what people need without forgetting what they want or aspire to be. So they took their idea from the GS, the ultimate jack of all trades and build something with more on-road bias. In my opinion, the more accurate Multistrada role model is the Tiger 1050 (literally a jacked-up Speed Triple).
The dream bike for me on the small displacement size is an SXV chassis with a Ninja 650 engine shoved in it. Would be around 330 pounds, but 65hp, twin that can easily handle freeway, massive brakes and loads of travel. Perfect city bomber.
The dream bike for larger displacement setups like that is the +4 inches of travel on a superduke mentioned above.
This depends on what you want to carry. If you are only going for a day trip or truck the bike over then ride around... then yes. But when you want to carry all the camping gears and supplies, you'll need beefier frames. Want to ride longer on the bad road... beefier transmission and cooling system. These components add to the weight. One reason why the difference between R1200GS and the Adv is about 60 lbs. (including the extra gas).
Where the S1000R's donor bike gets away with a sportbike's weight of 460 lbs (wet), the S1000XR carries more extra to accommodate more, ie. more of a 2-up riding and/or luggages.
Yes. That's exactly the design brief for the Multistrada ("multi road"): a comfortable, high-performance sporty bike with longer-travel suspension suitable for all manner of roads, including bad ones and the occasional gravel one. Not really intended as an offroad bike.
And this BMW is a clone of it.
I rarely need >6.7" of suspension travel on the road, so it's close to the ideal (though I find the GS to be a better touring bike).
Shouldn't it be more of the Multi cloned it from the R1200GS, Tiger 1050, Vstrom 650/1000? Not saying it's bad, it's actually really smart. Just like how they did it with the Diavel, a cruiser that weigh more like a sportbikes.
BMW had always been happy with the GS line up serving as more of the on-road adventure bikes... but people want something that can also win the specs war when in Starbucks... so they are partly just providing what people want (go where the money is).
And it would be better if it was 200 pounds lighter and had access to normal street rubber in normal street rubber sizes. And had better brakes.
I've ridden just about every adventure bike on the market, and none of them have all of these:
Long travel suspension
Large displacement engine easily capable of freeway cruising
17 inch wheels in 3.5 front and 5.5 or 6 rear
top shelf brakes
Weight in range of 450 pounds or less
Upright, spacious seating position
TC
ABS
And I'll add carrying capacity (mentioned above). All of these add weights. Unless one is willing to pay for the exotic lighter materials which would add even more to the price because it will also making the bike not as mass-produced capable.
Tiger 1050 was pretty close, but it was from the pre-TC era, the last model got ABS. Then it was replaced with a lighter bike, the Tiger 800, which Triumph followed BMW F700/800GS formula to keep the price lower.
By the way, if you count the S1000XR in dry weight, I think it's pretty much fit your list, Z3n.
The superduke has _almost_ all of them. The BMW adventure bikes are great but you make my point with the "never riding it offroad". If it's never going to be ridden offroad, it would be significantly better with 17s and bigger brakes. Sure, it's a great bike as it is, but it would be better if it wasn't getting shoehorned into a marketing role as an "adventure bike".
The best part of this thread is the profound defensiveness of the GS owners.
"It's perfect exactly as it is never could be better gosh just love having to find 19 inch fronts man that sure does make me happy!"
Just like all of the SUV owners, right?

But from what I've heard, the GS owners buy the bikes because of the riding position, how balanced the bikes are, and no excess weight... compared to the touring siblings RT, GT.