They are concepts you'd build often with a deep level of thought.
You should publish high fidelity ideas that keep you up at night.<p>Make a list of "n" things you'd do if qualifications and time and history and salary were no object.<p>There are some interesting projects I found :<p>- http://arep.med.harvard.edu/
- https://nintil.com/technology-some-people-are-excited-about/
- https://www.gwern.net/Statistical-notes#someone-should-do-something-wishlist-of-miscellaneous-project-ideas
-https://marginalrevolution.com/marginalrevolution/2019/12/work-on-these-things.html
- https://docs.google.com/document/d/1Vb8WWbsVyEJzl66_qqtZfFr2uLL07Y7SJH5XKldjDPY/edit