What programming practice that you once liked have you since changed your mind about? [closed]

//Coming out of university, we were taught to ensure we always had an abundance 
//of commenting around our code. But applying that to the real world, made it 
//clear that over-commenting not only has the potential to confuse/complicate 
//things but can make the code hard to follow. Now I spend more time on 
//improving the simplicity and readability of the code and inserting fewer yet 
//relevant comments, instead of spending that time writing overly-descriptive 
//commentaries all throughout the code.

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