I will be honest with you: I do not like the word "impactful," but that is neither here nor there in terms of whether "impactful" is becoming common usage and becoming more acceptable in written prose.
我坦诚地告诉你们： 我不喜欢这个词“impactful，”（有影响力的） 但这并不是 决定“impactful“是否成为普遍使用 或在写作上更多地被接受的关键。