Ideal features would include:
- a regular review of the things you've listed to see if they're still relevant and to help you prioritize
- a way to see what's trending amongst everything you've listed (ex. I have three front end web frameworks on my list but React is collectively popular, so perhaps I should start there)
- it could notify you if a new (good) book / blog post is published on a topic you're interested in
- you could compare with your friends to see if someone you know has learned it recently or to sit down and hack together
- it could share a common list of subtasks across users -- for example, starting with Django Rest Framework might consist of: (1) doing the python tutorial + (2) doing the Django tutorial + (3) doing the DRF tutorial