i Roboport Wagon
May I suggest a Roboport Wagon? (A wagon that acts as a roboport when the train stops - possibly with robots inside)
I like the idea of a train that can construct outposts by bringing all needed resouces. I think your logistic cargo wagon may be the first step, now only a roboport is missing. I also think of powering the roboport with your accumulator wagon.
I've seen a mod that allows Deconstruction Robots to mine ressources:
All together everything combined could enhance the late-game mining Experience, as suggested in
We were actually just chatting about the possibility of doing this in the mod making channel in discord yesterday - that's the plan! Hopefully should have something soon :)
For note, angel's mods has a vehicle roboport that can be put into specialized train wagon's equipment to act as this.
As a side idea, having vehicle equipment items to have a cargo wagon with an equipment grid (and power of course) to have that wagon act as a logistic wagon would be very nice, and would work with modded wagons unchanged?
The tricky limitation is that equipment grid roboports are, as far as I know, forbidden from having a logistic or connection radius, only a construction radius. So having a vehicle that acts as a roboport with any kind of logistic radius needs special trickery, akin to how https://mods.factorio.com/mod/accumulator-wagon uses hidden energy interface entities to do things that wagons are normally not allowed to do (while not having to do dynamic script work every tick and destroy performance).