Objects coupled with formal proofs, maybe. Otherwise, nothing has been lost: naïve approach to objects seems to work well for managing memory and garbage colle

Objects coupled with formal proofs, maybe. Otherwise, nothing has been lost: naïve approach to objects seems to work well for managing memory and garbage collection, otherwise it's just a bothering implementation detail of a language runtime, that does not help a programmer much and is itself a liability. Objects do dynamic checks at runtime, whereas types are known (and verified) before a program is executed.