It could be a replacement for the 'E', but the APIs are different enough that there's no drop-in replacement for the 'L' and 'K' and creating or making those compatible would be a significant effort. Would be great if someone did though :-)
Gotcha. On the ingest front, do you have any numbers around that? I see some benchmarks that focus on other (important) aspects like QPS but didn't catch anything on ingest.
Write speed (add or update) is typically between a few thousand to a few tens of thousands operations per second per node sustained, depending on sizeof data etc.
Sustaining throughput over long time is important and often overlooked mentioned in benchmarks.