Do not mistake domains you don't understand as being bad at things. Programs and extensions that are 26 years old are still running strong on Windows 10 today. The economy runs on ancient tools that rely on that compatibility.
Throwing together a pretty context menu isn't as important as making sure that all of the UI elements are accessible to screen readers and other tools. It's also trivial compared to ensuring that old programs that assumed they could just click on the third menu item to make something happen keep working even if you redesign the menu.