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We migrated the backend of the product we built for our client from WebLogic to Payara Server with great success. Payara Server has a much more modern feature-set and feel, gets you up and running quicker and we saved a lot of time configuring the server compared to WebLogic. Several things that were a big hassle to configure with WebLogic worked out of the box with Payara Server, Bean Validation being a prime example of this. We are now looking to the future and planning a move towards a more microservices oriented architecture with Payara Micro in mind. I would recommend both Payara Server and Payara Micro to anybody who values consistency, stability and productivity for their application development and deployment.