This is SUCH a niche system, that I don't understand why carrying adapter is a bad thing. There are already laptops that kinda fit his keyboard/pointer/size requirements.
I used to think it was an absolutely awesome for a laptop to have an rj45 - something missing from the VAST majority of thin & light ultrabooks. I still think it's useful. This week I used a laptops rj45 to figure out that the connection to a switch was working but not the connection from the switch.
However one thing I realised is that if I'm ever repairing computers I'm going to be carrying a toolkit with me regardless. If there's an issue with some locations network and/or devices I'm going to want a console cable, an ethernet cable, cable crimpers, a drill, screwdriver set, usb drive, velcro ties, spare parts, label maker, a whole bunch of useful things. I have a backpack just full of useful stuff. If I'm always going to have tools with me adapters aren't a huge burden.
Additionally most of my clients exist at geographically disparate locations. If I ever find myself physically connecting my laptop to stuff I ask myself where I fucked up. If you have to physically move yourself to a broken device and plug a laptop in to figure out what's wrong 90% of the time it's reflective of not setting up proper remote management tools. It means you have a more fundamental issue that wastes money on expensive labour and risks downtime. If I can't fix your systems with an instagram machine with zero adapters it's reflective of a deeper issue. Personally I'd rather use an off-the-shelf thin and light that's portable and inexpensive.
My intuition agrees. The threshold of features that OP is looking for amounts to "multiple devices all crammed into one". That is going to lead to a compromised workflow - there's more to configure on your end and you'll lose track of it in a digital sense instead of a physical one. Like with the actual Swiss Army Knife, most of the end result is likely to be unsatisfying as a professional tool.
For ordinary tasks, a consumer device that can SSH in, and ideally do some USB, probably is the right thing. Last week I put together a $50 vest-pocket writing kit with a smartphone stand and a folding Bluetooth keyboard(iClever brand, if you care). And in just a week of use, I've already had multiple strangers remark "I want that" - I can easily imagine using it for coding and sysadmin too. The real limits to client computing these days mostly revolve around operating system and I/O, and you do want to have lots of ports...but mostly on your desktops and servers.
As someone who's used a KVM->USB device before, check out this Startech device. Still outrageously expensive (WTH should a device like this cost more than $50?) but cheaper than the epiphan.
That horrible feeling when you get to the end of your five hour drive to the client site, and realize the adaptor is on your desk.
Of course, you can fix this with checklists or a shadow board style toolkit, but I do certainly dream of having one piece of hardware that connects to everything I use.
As an industrial programmer and occasional field sysadmin, this notebook would be amazing for me.
Of course, it would probably also be so expensive that I would never buy one...!
I would assume, that i would have a 'toolbox' like any handyman but for it stuff.
I like the idea very much of switching input/output and using it for that (had often enough once in a year experience with this issue) but i can also just carry a lcd display with me. I would also make sure that my customer sites are in a state of ready.
I would not carry a macbook, too expensive, significant chance of being biten by their history a defective design[1], very difficult to upgrade or repair, etc.
- His "video subsystem" idea already has a solution for many years. KVM2USB. https://www.epiphan.com/products/kvm2usb-3-0/
- His "let me turn this into a boot device" also has a solution. Many virtual cd rom devices exist, for example https://www.amazon.com/Iodd-Iodd2531-Black-Virtual-Enclosure...
If you're in such a niche requirements.. either you pay a ton ( military laptops), or you're ok with adapters :)