One problem with transporting items with minecarts is that you can't reuse chest minecarts when broken, unless you have a player craft a minecart with chest. I suggest that you should be able to use a dispenser facing an empty minecart, to put either a chest, furnace, and hopper, and maybe even TNT into the minecart. Another suggestion is shulker box minecarts, which would work exactly like chest minecarts, execpt they would be made with a shulker box and a minecart, and would keep the items inside the shulker box when broken. This would make transporting shulker boxes from place to place a lot easier.
One problem with transporting items with minecarts is that you can't reuse chest minecarts when broken, unless you have a player craft a minecart with chest. I suggest that you should be able to use a dispenser facing an empty minecart, to put either a chest, furnace, and hopper, and maybe even TNT into the minecart. Another suggestion is shulker box minecarts, which would work exactly like chest minecarts, execpt they would be made with a shulker box and a minecart, and would keep the items inside the shulker box when broken. This would make transporting shulker boxes from place to place a lot easier.
Given automatic 'load and send' & 'unloading and return' stations, I'm not seeing a strong need for this….
Under what conditions would you find it preferable to break and reconstitute item minecarts?