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Although obviously not all scenarios can be covered by a single design, is it generally felt now that ORM classes should be passed to and fro between the presentation and business layer (either local or remote), replacing the need for data transfer objects? As far as I can see, using ORM classes presents problems of unnecessary eager loading, context management issues and tight coupling, but also saves a great deal of time and keeps things simple. Is there now a standard approach that generally favours one over the other (for the majority of situations)?