This is great from a developer standpoint because it means you can easily write code that works on all versions of the site. Not so great from a user standpoint because all the things that made the desktop version fun seem to have been lost along the way.

— Charles Johnson (@Green_Footballs) July 23, 2019

When Duolingo did this, not only did they flatten out the website, they flattened the mobile app as well. It looked so crude compared to the previous version I actually wrote back to them, as a developer, and complained. I have gotten used to it, but the previous version was much slicker and more pleasing to the eye.