After gaining huge popularity with mule 3, Mulesoft decided to release mule 4 with a drastic change. They re-implemented the engine, re-structured the Mule message, wiped out mule expression language, redesigned error handling and many more. Due to some fundamental changes in mule 3, they could not come up with any migration tool for migrating mule 3 to mule 4. Moreover, they had to extend the support for mule 3 till March 20, 2021, and extended support till March 20, 2024.
Many organization already built their API platforms based on mule 3 and now evaluating the mule 4 to migrate. A common question is: is it worth it? Let’s have a quick glance at the differences between mule 3 and mule 4.