Trains and carts

Hello reader, I hope you're having a nice day and time to read my suggestion.

  So basically chains are useless and are only uses to craft few things or just sits around for decorations. So Mojang, I suggest you add a feature where we can link/connect minecarts with chains to make little fun trains,this will not only make it look cool but make it easier to transport villagers and items etc. I also suggest a crafting recipe of Smoker and Minecart to make Engine-minecart so that when we put coal/fuel in the Engine-minecart, it speeds up the train. I also suggest the minecart link amount is only 4-5 minecarts to make it more simple :D. Thanks for your time. -GlitchingMarc