Giant Shrew Trains

Trains are long requested in Minecraft and whilst Minecarts do fill a similar niche they are held back by their slow speed and updating them may break older builds. Trains could encourage building infrastructure for travelling vast distances and reward the player with a less resource intensive manner of travel compared to elytras and boats. Why not have it be a mob like the Happy Ghast is to hot air balloons? Introducing the shrew ( shrew shrew train if you will). Shrews have caravan behaviours where they will link together like a train in real life. A giant train sized shrew (possibly with a cute conductor hat for the saddle) with shrub themed tracks to guide it crafted with leaf litter, by just pressing forward once it will move similar to a minecart but much faster which adds a benefit over ice boats that require constant input. A food source like spider eyes could be the fuel source if one is needed and fermented spider eyes/new item to grow them like the Happy Ghast. They could be bred to add more cars to the train and different saddles for different functions like chests saddles, furnace saddles, redstone saddles, basically the same as the minecart with the added benefit of carrying more people and being able to stand on it like the Happy Ghast. The shrew could be an adorable mob, a long requested feature, and a fun reference to real life animal behaviour all rolled into one.