FOSS gamedev and creative worlds

Hi !

Found mcserver, Minecraft like server which is apparently fluently working with normal minecraft like client.
As I have understood - mcserver can use same maps as normal minecraft does - so file format is more or less the same, however - minetest uses some sql lite 3 / sql for storing map information. Why to use different file format ?

Same question applies for communication protocol - minetest does not seems to be compatible (even port is different) with minecraft. Why to use different communication protocol ?

Minetest also uses leveldb and redis for datastorage. And why be compatible? Minetest is Minetest. Not Minecraft. Most people try very hard not to make everything just like Minecraft.

There is a person working on a direct minetest map from Minecraft map converter (too lazy to fix) I suppose it will be possible, but I think that it is low on our priority list to even try. We do kind of need a better engine/game to even try...

Because we're a separate game and the Minecraft protocol doesn't allow certain features like server-side modding?