The open_as_if_parented method was intended to support the use case of Audio Unit plugin views. However, the Audio Unit API differs in important ways from other plugin APIs (such as VST 3 and CLAP) with regard to the lifetime management of the plugin's NSView, and trying to support both lifetime management patterns simultaneously has been the source of complexity and bugs. Thus, rather than implementing Audio Unit NSView management directly in Baseview, it will be the responsibility of plugin frameworks to implement a compatibility layer between the Audio Unit API and the Baseview API.
The open_as_if_parented method was intended to support the use case of Audio Unit plugin views. However, the Audio Unit API differs in important ways from other plugin APIs (such as VST 3 and CLAP) with regard to the lifetime management of the plugin's NSView, and trying to support both lifetime management patterns simultaneously has been the source of complexity and bugs. Thus, rather than implementing Audio Unit NSView management directly in Baseview, it will be the responsibility of plugin frameworks to implement a compatibility layer between the Audio Unit API and the Baseview API.