Hi all, the product team driving this migration has provided me with answers to a few of the questions in this thread that I can share with you.
I presume sections will also collapse/expand?
Sections will definitely collapse in list view.
Hopefully it will be collapsible also in the Timeline view
Timeline view is out of scope for this data model migration, but collapsable sections in timeline makes sense and will be considered for follow-up work.
So would this affect the sections in task themselves? Like subtask sections.
Sections in subtasks will remain as regular tasks, as the data model changes required to put column-sections inside tasks is far out of scope for this migration. This means that a subtask section cannot also be a project section. (A subtask section multi-homed into a project will appear to be a normal task in the project.)