Keyboard only users (or users of keyboard based assistive technologies) depend on seeing focus indications at all times and if they can’t see them, they are left to guessing where they are. With soon-to-come WCAG 2.2 focus must be at least partially visible at all times, simply put.
Bogdan on Digital Accessibility (A11y)
My thoughts, comments, explorations and useful resources on and for Digital Accessibility (Web, Mobile, Virutal Reality, Augmented Reality and so on)