&gt; I&#x27;m still writing valid 2.7 code that could be migrated to 3.x at any point<p>Well, that&#x27;s kinda true, although there is somewhat of a learning curve doing 2-to-3 migrations. Depending on your situation, this may or may not matter, but if you need to &quot;move fast&quot; on this at some point, it&#x27;d at least be beneficial to know what&#x27;s involved (even though it&#x27;s not that onerous IMO).