Salaam (سلام) I came back to Duolingo after a 2 year hiatus for Arabic. No regrets.
I love Arabic! The course is super well-laid-out and the diacritics help me to remember the words when I learn them. I know I won't get to use them in real life but they're very useful when learning. I learned the Arabic script on my own time and how to write it, but never learned the diacritics. It's really fun! ^~^