Drools is awesome and we use it in some of our projects. but it just feels very monolithic and not a cloud native solution. What are some good lightweight alternatives to drools?
To declare incremental constraints in OptaPlanner, take a look at ConstraintStreams if you want to avoid learning DRL: https://www.optaplanner.org/blog/2020/04/07/ConstraintStream... It's very similar to Java 8 Streams (but incremental and under the hood it uses Drools).
Is Kogito ready for production use? Does it have a UI that lets users develop their own rules?