Someone on my team looked at it, and for our workload (lots of MGETs per query) it wasn't that much better than redis. We may still go with it though, our GCP Memorystore instance is pretty much at 100% CPU constantly.
Long running commands are still a problem. We have infrastructure in the Enterprise version to alleviate this but so far we’ve enabled it only for KEYS and SCAN. MGET does come up frequently so it’s on our radar.
We have still yet to evaluate Redis6.