Great news for fans of these macros: we've changed course and are starting to release a new file viewer for them. Check out this blog post for all the details.
Please note: We've received feedback that the new viewer for the Excel macro doesn't meet expectations for some of you. Head over to https://jira.atlassian.com/browse/CONFCLOUD-54876 for our run-down on the current status.
Please also note: this update is only for Confluence Cloud.