Another reason I think forgetting is so important to continuous learning is that if new ideas conflict with accepted ideas, it will be more difficult to integra

Another reason I think forgetting is so important to continuous learning is that if new ideas conflict with accepted ideas, it will be more difficult to integrate them. Like adding to a map or puzzle where the boundaries don't mesh. So by having fewer deeply held beliefs, new ideas are free to enter and coexist. You can also compartmentalize to some extent like superpositions of possibilities where each one can have new consistent information added without regard to how it conflicts with other possibilities. Not that I have a clue if this is a good example (or advisable) but a physicist could learn both loop quantum gravity and string theory and relate them both to understanding our world and keeping them separate could be helpful for learning.