I have much more than 20 packages in aur, most of them are dependencies from steam-native-runtime. Since steam is popular, I can understand that many have more than 20 packages.

Now when I was reading the ArchWiki I saw that it is mentioned as an alternative, so I assume I can remove steam-native-runtime and all dependencies. Perhaps the instructions have been updated or I googled for instructions and found another page. But there could be other popular packages with many dependencies.