How I view carts_on_rails in Minetest

[elemashine]

Please, tell me, what do you want from carts in Minetest?
It is not feature requiest, because if Minetest contains rails, there must be trains or similar, no matter how long time it will take. Just your own opinion - that may be useful if anybody create that mod or made better xyz's vehicles mod.

My view of this:
Crafting of carts must be more harder than any craft_item. It will be more interesting and real
All crafted carts, placed on the rails in one line merging into chains with one (maybe first) driven-cart
Carts can move in y-direction and rails under carts looks tilted(maybe need filled-corners-and-bottom texture for that)
Only one person can move chain, but anyone can sit down on free cart(just one person)
Maybe one railroad may contains finite number of chains, and every chain combine finite number of carts - it will reduce server load