simplethings/SimpleThingsFormExtraBundle — comment on commit a483cad92c2d3f5f9577dc1d1a4dec2f1122488e
File: Form/Extension/ErrorAttrTypeExtension.php line 40
By beberlei:

Problem would be that we need to override "widget_attributes". We have a bunch of different formatting themes in our application and we need this attribute for javascript based error handling on every form.

But its overhead you are right, this should be an optional field extension.