The Word for Windows desktop app in Microsoft 365 apps for enterprise boasts “modern comments.” Some good features are included, like snippet previews in the email notifications sent when reviewers post comments to documents. Word even has its own task management capabilities which aren’t linked to Microsoft 365 tasks. That’s about the only bum note sounded by modern comments.
Microsoft’s service description for OneDrive for Business promises “beyond 1 TB, to unlimited” storage. In reality, most enterprise Office 365 accounts have 5 TB storage and won’t need to go further. But you can… first to 25 TB and then even more in the form of SharePoint sites. You just have to talk nicely to Microsoft support.