Customers who run older Jira instances might still have the free version of JSU. Now it is no longer free and requires a license to operate, which you'd need upon upgrading to the latest Jira instance. Recently, JSU announced price increases, up to three-fold, and as of November 4, 2019, JMWE and JSU are priced the same*. However, some customers either consider purchasing a single workflow automation tool or want to replace JSU with JMWE. In most cases, thanks to many point-and-click extensions in JMWE, as well as extensibility via simple yet powerful scripting, it can be done easily.