This problem is rooted in the discussions that have already taken place, which suggest that finding a solution is a difficult challenge due to the intricacies involved in such configurations. The matter at hand delves into the technicalities of system design and functionality, where the scaling of clusters beyond a pair introduces complexities that make the implementation of sibling eviction a non-trivial task.

These complications indicate underlying limitations within the current system’s architecture or algorithms that may not be conducive to straightforward enhancements. As such, addressing this could potentially involve a re-examination of the foundational principles that govern the system's operation with respect to cluster management and resource allocation, among other factors. The focus here is on identifying a viable path forward that would allow for the extension of support for sibling eviction without compromising system stability and performance.

In conclusion, tackling the challenge of sibling eviction when dealing with more than two clusters remains an unresolved issue for version 3.1, highlighting the need for continued investigation and innovative problem-solving strategies to overcome the inherent difficulties presented by such complex system configurations.