I like to make sure everyone on the team supporting the codebase is on the same page. Once we all agree that yes, we want to use the new feature then we can incrementally improve the code. I would not use the new feature until that first step is taken because inconsistency when you're not expecting it can be pretty confusing.
If it's just me coding, I'll use it because it's probably a side project and I want all the new things~~
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