In V7, cache key for region is simply depends on the Content Component in this region, ContentComponent and Region is 1-to-1 relation, that's easy to understand.
But V8, one region could have multiple ContentComponent, do we still cache for region? Or we only cache fragment in each ContentComponent? If we still cache for content in region layout but not in Content Component, what is the cache key for region, how do I set TTL for this?
Thanks in advance.
Alex