As a 2b2t player, I would say that whilst it initially appears to be rather difficult to exit said 'cube', it is in fact rather easy to escape. One must simply

As a 2b2t player, I would say that whilst it initially appears to be rather difficult to exit said 'cube', it is in fact rather easy to escape. One must simply be willing to try a few times and meet new people. Why go near people who are potentially hostile? There is no loss: one simply restarts with the same amount as before (0), but one could make a friend which will provide one with food etc. in order to facilitate easier arrival at 2b2t Immigration. 2b2t Immigration's officers are rather ... variable. Some will kill on sight (KoS), whilst others will give render assistance. However, the main factor which has lead to 2b2t spawn becoming easier is the road system. There are roads every multiple of 400 blocks up until the 1200 orbital, for the most part, thanks to the efforts of several players. The roads lead to portals, which in theory allow you to get to over 100k overworld by walking along nether paths. Within the 1200 radius there are a multitude of farms, and within the latter radius there are far more indeed. After about 1k the landscape appears to be vaguely naturally generated, and after 5k all destruction of spawn like intensity ceases to be.