Comment by I_Am_Nous

The idea of basing a business around trying to get people to love a model which could be changed at any time seems both futile and immoral. At least when a person dumps you it's generally understood to be a decision made by a person, not "we adjusted the model for performance reasons and now your virtual partner is essentially dumber and will never be the person you fell in love with." Illness and injury can change a person, but that's a possibility rather than an inevitability for a partner built on top of someone else's model.