I don't want to blow the potential issues out of proportion. All new instances face unexpected challenges, particularly if their admins are also finding their way around the fediverse. Though I really do think the longevity question is the most critical from the perspective of the health of the fediverse. The forkiverse has brought 2k new people onto the network, and it would be a shame to lose them just because the operators or their employer decided that the experiment was no longer worth funding.