It's not almost zero impact. It's a clear negative impact to anyone who's mindful of things like latency, workflow, muscle memory, gaze patterns, information density, attention, special recall, and working memory. These design patterns are nothing but a frustrating, dazzling interruption designed to hijack your emotional faculties instead of providing you with a useful tool. They turn real concentration into mush.

Nothing comes for free and if you're optimizing for "just neat" then you're paying in usability.