Yeah, I hear that. Although, I’ve travelled many thousands of blocks in Minecraft worlds, I’ve never travelled tens of thousands, so the limits in Luanti work for me. The increased world depth in Luanti seems more beneficial to me. YMMV

Currently, the world dimensions are larger than that (according to the wiki):

“Minetest’s world is a huge cube with a side length of ca. 60000 blocks. Each dimension (X, Y and Z) ranges from −30912 to 30927.”