I would try to create a constructive discussion,that's it.

Finite water.

I know, It was suggested again and again, ad nauseam, but has always been rejected by Minecraft fans… but why?

Finite water is a realistic concept that would bring new mechanics in the world of Minecraft, such as the construction of dams, aqueducts, secondary channels for rivers, the strangest traps, new farming techniques and "dynamic terrains" (for example a normal cave could be suddenly flooded completely if you mine in the wrong place, players may choose to dry a lake to build in that area, the rain may have a more central role, affecting rivers and their stream power… and (finite water) probably would create many other possibilities).

But what brings you not to accept this idea?

Are you sure that would ruin the game?

Am I sure that Finite Water would not ruin the game? Well… honestly I don't know.

But I think that if it was added with some "considerations" (for example, keeping infinite the sea-water, localizable obiously via biomes, and keeping infinite the rivers source) would unlock, at least, may possibilities in terms of gameplay and construction.

I know that it would not require just 3 or 4 lines of code, and that Mojang should completely change rivers-generation-system and who knows what else. But apart from the technical difficulties, in your opinion as a player, not as a developer/modder, it would be a good or a bad idea?