It's not in line with Mojang's philosphy to add granular changes like barrels. Vanilla has perfectly acceptable static and mobile storage solutions, and "upgrading" isn't their style. They long ago moved away from the picks-replacing-picks gameplay mentality and the concept of linear progression in general. The cheapness of most redstone devices suggests this, but I think it was really solidified when they added the piston mod to the game. That served as the template for how in-game utilities would be handled from then on: they must have uses that expand gameplay in all three areas (creative building, normal survival, and for map-making), they must not have a linear progression (sticky pistons aren't better, just different), and their expense should be nominal and never require items whose only use is for crafting. ...aside from paper. Or bricks. Or gunpowder (why has no one ever made a mod where you can place gunpowder??)