One year ago we went live in production with a rewrite of the core of the platform in Akka.net. Although the initial release date had to be delayed because a bug we found in the pre-production environment in large Akka.net Clusters, I have to say that after fine tuning remoting and clustering parameters, the system has been stable and the improvement of the performance in soft real time processing is noticeable and also more scalable.
The core of the system is formed of two services plus the lighthouse, initially we went live with a single cluster of more than 50 instances, in the latest release this week the count has gone up to 101! service instances distributed in three clusters.
After this experience we have continued using Akka.net in other parts of the platform like dynamic clusters of pub-sub actors used to distribute the load and control the concurrency when processing messages from RabbitMq.
Also have started using Akka.net in conjunction with .net core, and had the opportunity to contribute to the Akka.DI.Ninject repository to convert it to .net standard 2.0 so it could be used in .net core services.