I prefer to believe that tech-savvy dorfs are just putting
the right sort of wheel on their wheelbarrows (though it should still give an upward movement penalty and increase downwards accident tendency, as should ramps, especially if damp and/or mossy). That's just in my head, though.
I think we were half-promised a vertical rope access at one time (like a well, but bucketless and maybe mechanismless if it's to be shinned up and down not hoisted with assistance) which was due to help out with old-style channel-without-ramping and mid-cavern-ceiling breakthrough access, and that might have been loadless/no-carry in nature (unless, with mechanism as well as anchor-block, the courier of an item shins down and up the rope, to attatch the load, then 'well-draws' the load up themselves) for rescue or exploration (or retrieving pocketable/backpackable items?). That it could be let down at need and retracted otherwise would have (properly coordinated) made a good selective entry/exitway or even a kind of sallyport you could deploy as necessary over defencive walls (back before flyers and climbers made that a little less secure).
I think a
paternoster (multiple ropes plus material for 'stages', in a number related to the Z-reach, at least one mechanism (maybe two) and a power-source or integrated dorf-spot for manual winding) has been suggested, and could be non-cargo (step-type, see also the
Man Engine) or cargo-capable (
supervised cubicle loading, depending on how the cargo is conveyed in) has been put forward, as have inclined-plane/funicular rail systems (with shared, half-shared or separate rails, the first two needing mid-point passing junctions of one type or other), but most of this was probably rendered null with the minecart addition (except for the one-tile X*Y footprint nature of the more vertical types) and probably mostly because they are/seem out-of-era.
There's a lot of potential changes, but nixing longstanding stairway/barrow traffic (and the rest, like carrying minecarts, or indeed just hefting a walltile's-worth of stone up any tween-level route, single handed with nary a sweat) is probably not going to happen. Says I, now practically inviting this to be in one of the next major revamps of gameplay.