Which units are the most 'accessible'? px/em/rem?

In the article 'The Surprising Truth About Pixels and Accessibility', Josh Comeau discusses the importance of adjusting font sizes and elements in web projects concerning accessibility. The author highlights how traditional thinking around 'pixels' may not be the best approach when reflecting on the diverse needs of users. He reminds us that not all users have the same visual needs and that different devices may display content differently. By understanding these principles, designers can create more inclusive websites that are better suited to a wide range of user capabilities. Ultimately, as Comeau notes, thinking about accessibility should not be an afterthought but an integral part of the design process.