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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
It is worth to note that the implementation of GetDescriptorSetLayoutSupport is the most basic, that is just returning supported. That basic means that we rely on the maxDescriptorSet* to decide if a descriptor set layout can be created or not.