Numerous studies have now found that when classroom material is made harder to absorb, pupils retain more of it over the long term, and understand it on a deeper level.

Some studies also show there are benefits of curiosity in improving the long-term level of learning and memory, and a lot of positive results are connected with curiosity.

Although some systems administrators still use the term "maintenance level" when discussing their AIX version, the term is now reserved for legacy AIX systems.