Thanks for advising. You reminded me there are still people who consider that Accessibility Navigation is always needed, so it looks like dropping it now is not a good idea.
However, is there a statistic shows that loads more people are starting to use mouseless laptops? Schmotty mentioned tablets. So maybe it should be that loads more people are starting to use tablets instead of mouseless laptops?
Yes, thanks for your good point. Apparently, it depends on what kind of audience a website has.
I guess the reason CSS-Tricks doesn’t have an Accessibility Navigation is that CSS-Tricks is for web developers instead of visually disabled people. So it is reasonable that this website doesn’t need such a navigation.