Now that they have faster conveyors and stacking, they've become quite viable for moving large quantities long distances. Which is fine, but it feels like the right way to do that should be trains. My thought is that quality wagons should be able to hold a lot more and quality trains should move a lot faster, and/or fast fusion trains.
I did a 1m eSPM base though, and I don’t think the totality of all of that would bring me back to trains. Belts are extremely reliable, and I have never managed to make trains so.
It all works but feels wrong and dumb.