Can 'Wiki Style Renderer' be made the default for text fields?

[Deleted user]

According to documentation: Configuring Renderers, the 'Wiki Style Renderer' is the default for text custom fields (single and multi-line). However what I observe (as of JIRA 7.2.4) is the actual default is 'Default Text Renderer'.

Is there any way to change the default setting at least for newly created fields?

Is there any way to safely bulk modify the renderer?

Otherwise switching renderers would require 1000's of modifications to individual field configurations.