What do you think of upgrading incrementally via each minor versions (e.g. 2.0 -&gt; 2.1 -&gt; 2.2, etc.)? It will be easier to reason (and debug) the changes between each version, and test compatibility on the dependent libraries.<p><i>PS. I have a Play 2.3 app already in production, 2.4 currently in development, and plan for a new app on 2.5. I&#x27;m upgrading from the oldest one first...</i>