In the long run, Flash was a blip on the web. 2004-2010 tops.

NNGroup "best practices" have been obsolete for at least 15 years, because the purpose of a website is no longer about displaying free information. Websites have become a fully commercial enterprise focused on conversion, so every trick in the book is used:

- Infinite scroll and autoplaying video on social media and blogspam sites

- Layouts shifting after content load because of the Javascript ad delay

- "Other Articles you might like" blocks in the middle of an article

- "Subscribe to our email newsletter" popups/modals everywhere

- "You are reading 1 of x free articles" dickbars

and that's just scratching the surface.