This is a really good point. Engineers are constantly trying to predict the future, but ability to do so often does not depend on engineering skills at all. Oft

This is a really good point. Engineers are constantly trying to predict the future, but ability to do so often does not depend on engineering skills at all. Often it is completely out of your control. Instead of trying to make code "extendable" I found that it is much better to make code "disposable". Do not hope you'll make the right prediction. Expect to be wrong and be able to recover fast.