For the end of the game i say no less than 6 months, for the experimental build to become stable i'd say from 1 week to a month and a half. Nevermind, you meant the public servers to switch to new exp version after reading more carefully. p.s. Well done to the devs for this amazing game, i was really critical about it initially but you guys came a long way, the progresses have been slow but exponential! I don't know of any other game that is so "realistic" as surviving goes. No fp/survival will have reach this level, no dayz (that i love), no rust, no the forest, no nether, no unturned, not even don't starve! I'm glad i bought this (2 months b4 steam), and i'm proud i got 4 friends to buy it. Keep on doing what you're doing for whatever (time) it takes!