Great summary 
Let me join in on this 
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Storage limit was upped to 128 KB which is great but I will have to implement a lot of logic to split up larger data and query+merge them on read. That is really not that great. I would be happy with 5MB already, but Nathans proposal sounds even better
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The permission linting errors really confuse me too. Atlassian please update the docs, thanks
I do not know what I need to change to make the linting go green.
warning There are deprecated scopes 'scopes' in the manifest.yml file:
'read:jira-user, read:jira-work, write:jira-work, manage:jira-configuration'.
You need to update this app to use new scopes and remove the deprecated scopes.
Learn more at: https://go.atlassian.com/forge-permissions.
valid-permissions-required
- Lastly I will always bring up the missing Macro Bodies on Forge for Confluence Macro Bodies in Forge - #10 by clouless