A: Yes, that is the main appeal. Because it is a single HTML file, it does not require admin rights. If the school blocks file downloads, use the bookmarklet method.
The ability to join 1.12.2 servers using specific Eaglercraft-to-Java relays. tuff client eaglercraft 1.12 download
If you manage to grab the latest build, here are the features that usually set Tuff apart: A: Yes, that is the main appeal
A: Eaglercraft itself is a legal gray area as a reverse-engineered clone. Tuff Client modifies that clone. You will not be sued by Microsoft for using it recreationally, but you can be banned from specific servers. tuff client eaglercraft 1.12 download