The situation is bad enough that even for a moderate-sized codebase a newly hired employee is expected to contribute within increasingly (decreasingly?) short t

The situation is bad enough that even for a moderate-sized codebase a newly hired employee is expected to contribute within increasingly (decreasingly?) short time. Getting familiarity with existing codebase is one of the most specific levels of training "on position", yet even that training is deteriorating to shorter and shorter times.