The appreciation is directed at the nuanced approach to system topology constraints within these frameworks. Earlier versions mandated simplicity and small size to ensure speed, but newer iterations allow for greater complexity and scale provided that performance (speed) isn't compromised.

A particular point of concern is the handling of sibling eviction in version 3.1. Despite previous conversations on the topic, the issue appears to be a challenging one, especially when attempting support for configurations involving more than two clusters. This limitation suggests that while progress has been made in certain aspects of the framework's design, other elements, like sibling eviction mechanisms, still pose significant difficulties and may require further refinement to reach an optimal solution.