It depends. If it's not some core area of the code, but more like a script, some code that lives at the periphery, it might be better to "duplicate" almost simi

It depends. If it's not some core area of the code, but more like a script, some code that lives at the periphery, it might be better to "duplicate" almost similar code that is hard to abstract. I saw attempts to remove "duplication" that made the code so hairy and hard to read, as opposed to very readable. I put duplication in quotes, because code might be similar, but not 100%. Some code is easy to deduplicate. Some code might be hard, and if the overengineering is done to remove 2 occurrences at some code periphery, is not worth it.