This is often a completely reasonable thing to do. If your goal is to ship features quickly, using a new technology will just slow you down. If your goal is to

This is often a completely reasonable thing to do. If your goal is to ship features quickly, using a new technology will just slow you down. If your goal is to learn new technologies then this is a problem. So it depends what your goals are. Also, worth keeping in mind that even if you're not using new technologies it doesn't mean you're not learning. There are many skills involved in programming than "knowing how to do X with Y". For example, knowing how to prioritize based on your goals. (So if your goal is shipping quickly you might be doing exactly the right thing.) More here: https://codewithoutrules.com/2017/06/01/practice-on-the-job/ https://codewithoutrules.com/2017/06/01/practice-on-the-job/