How to only show the options and blocks you need in the Gutenberg block editor, making it simpler and cleaner for editors, authors, and you.
That "the website is usable for users who use a keyboard and not a mouse" is the second requirement on Digitaliseringsstyrelsens list on web accessibility.
Securing websites is tricky, and it may be hard to see what you're gaining from the effort. But if your site is compromised, you risk harming both your company's reputation and ranking.
It's a boost to the usability of your website when you clearly indicate that a link leads out of the site or to a PDF file.