We need option for default value for Link filed types. When you add a Link field to existing model and this link field is referencing the same record, then you need to update all model references manually, which can take a lot of time. The default value would save lots of time.
This would be a huge +. We have fields present on all models, like Header and Footer, that are references to other models. Having these set to a default header and footer entry would be ideal, as authors often forget to add headers and footers to their pages, or aren’t sure which ones to use.
+1. Default values for links would enable very powerful data modelling options