Cutsomizable Versions

This Would Revolutionise minecraft and how we play you could make your own version by selecting custom in the create new installation you will be able to take and ad stuff like bees to 1.8 or 1.14 swimming to 1.12 and even taking the bushes from 1.15 this would make it so you can customize everything thata MOJANG has added evoer there 10 years of minecraft and when connecting to servers i haven't thought of that yet but i think MOJANG would be able to do something about that