No I do not have any rod that has an extra short collapsed length, though of course I do have rods that meet the other two desirable attributes of a “travel rod”: multi-length (i.e. versatile) and robust.
Trend wasn’t the best word choice, but the title box was to short to add - Latest Catchy Marketing Phrase. 
From my previous profession I’m aware that companies keep a keen eye on what their competitors are up to. They either immediately start developing a competing product or set back a while to wait and see if their competitor makes a profit or looses their shirt before either jumping in or patting themselves on their still shirt covered back for avoiding jumping on a money loosing bandwagon to soon.
I have no need for a rod with those features. I don’t travel anywhere by plane or train. I’m retired now, lotsa time, not lotsa money, so I also don’t need an extra compact rod to keep in my work vehicle to take advantage of some fishing spot found by chance during the drive home.
I can pretty much already meet the Shimano Pack rod sales pitch of, “いつでもテンカラ、どこでもテンカラ”, Tenkara Anytime, Tenkara Anywhere. That might change if or when I get my little dual sport Yamaha thumper motorcycle running right again. It has a nasty carburetor problem I can’t solve which I blame on that nasty ethanol contaminated gasoline. Where a super short collapsed length rod might be more attractive.
I don’t backpack deep into the woods to overnight and fish remote streams. Most of my fishing is done fairly close to my car, or at most an hour walk over easy terrain to a fishing spot.
Primarily I fish with rods that I like the way they cast. Mostly I choose to use a rod I particularly like the way it cast light line. I will use 2 号 line as long as I can get away with it.
And actually I’m pretty fond of rods like the Nissin Air Stage 450 or Royal Stage 390, that have long collapsed lengths of 40.5 in and 44 in ( 103cm & 112cm). With fewer sections to extend or collapsed they are quicker to deploy or stow, and with fewer segments they have a different feel when casting compared to rods with more segments.
As for why I make post about Tenkara topics that don’t especially grab my attention because it might be something that appeals to me for personal use . I just post it because the topic might appeal to others or as something to post about, and I’m a bit of a “curious wanderer”. Who finds it fun and interesting to discover different facets of tenkara. Different gear, different fishing methods, different types of activity. I would never say how someone fishes, and calls it tenkara fishing, isn’t tenkara. I might think their method doesn’t appeal to me or think there are better methods to use, but would never say, “Hey you’re doing it wrong that’s not tenkara”. They’re all just different ways, 10,000 people 10,000 ways of doing stuff or enjoying it. Maybe what I find will appeal to others for their own amusement, use or experiments.
Things have changed a lot since Daniel G walked onto the stage, along with Dr. Ishigaki’s goal to expand tenkara toward increased activity both inside Japan and to the rest of the world.
Seven years ago we were mostly only seeing the tenkara world through a window covered with multiple layers of Swiss Cheese. Only seeing what was revealed by a few holes opened by the early promoters removing a slice. Today more slices are being removed by later explorers revealing more holes that provide a wider view of what tenkara is. Such as the DT guys or pikers like me, us on the forum or other SM, and the people who have had the opportunity to travel to Japan and experienced it first hand with people with 30+ years of tenkara experience. And people in the West are pushing the evolution in new directions too; new methods, new rod models with different characteristics, etc. There’s always something new to be discovered (from gear to method to history / culture), sometimes it’s something completely new, sometimes it’s something old that’s found again.
Marketing a Pack rod or Travel Rod, or a Tenkara Kit, I think are all just attempts to draw more people into tenkara fishing. Rod manufacturers have taken a page from Honda in the 1960s, who used the approach of - You Meet the Nicest People on a Honda - iow - Ride a Honda, Anytime, Anywhere, Anyone. (btw I’d love to get my hands on a Honda Cub)
All that completely fails as a short answer to the question, do I use a travel rod. But. That’s it.
Right?