You can migrate ASPX pages in Insane Mode to Microsoft 365 with a few exceptions and limitations.
Index
Classic pages
SharePoint 2003 and SharePoint 2007
Pages from SharePoint 2003 and SharePoint 2007 are not supported in Insane Mode.
When a library contains an ASPX page, the migration of that whole library reverts to Normal mode
Note: Normal mode has its own limitations like list item IDs and unresolved users that are not supported.
Webparts not supported in Insane mode
Some webparts will not migrate in Insane Mode. A warning will be displayed in your Migration report when and unsupported webpart is detected.
Other webparts not supported in Insane mode
Any webpart that is not included with your basic SharePoint package will not migrate in Insane Mode.
Note: Custom or third party web parts are not supported by ShareGate Desktop. They could migrate in Normal mode, but there is no guarantee that it will work.
Modern pages
Modern site page templates
Modern site page templates are not supported in Insane Mode.
When the library of a modern site contains a page template, the migration of that whole library reverts to Normal mode.
Note: Normal mode has its own limitations like list item IDs and unresolved users that are not supported.
Modern site page comments setting
The Comments setting is not preserved in Insane mode. The page at the destination will have the comments enabled by default.
Webpart toolbar type
The webpart toolbar type is only supported to Microsoft 365 in Insane mode.