Minetest Game can't be finished, because there's no established goal... or more like, the goal is for development to be organic/chaotic, driven by the conglomerate of views each of the devs has about what minetest_game is, often following conflicting directions.
See this log from irc:
http://irc.minetest.ru/minetest-dev/201 ... #i_4400292 I'm hoping some subgame gets popular with a more stable direction. But since minetest_game is bundled with the engine this is not likely to happen (often people assume minetest = minetest_game, like in this post), other subgames are always gonna be the second install, or more like big modpacks/ total conversion.
The devs said they want to bundle another subgame.. Maybe this would help. But IMHO it would be better if they don't bundle anything (not even minetest_game) and instead give more love to the main menu, add a section to download all the games posted in the forum from the client and making it more user friendly to download and start a game. If you only want to play multiplayer on a server you don't even really need to download any subgame anyway, why bundle a whole set of them.