> I see the claim of saving everything on the filesystem and collaboration via git.
yes, ALL IN on git :) based collaboration
> Is there a way to handle secrets outside of this flow?
Check: https://docs.usebruno.com/secrets-management/overview.html Two ways of handling secrets.
> collection A sets a variable, collection B uses it.
In bruno collection is the first class citizen, environments reside inside a collection. There is plan to support global environments for the use case you mentioned.
> moving requests in a collection via drag/drop isn't obvious and it's actually a pain if you're trying to replace the top item.
yes, this ux needs to be improved and there is a bug in drag and drop which should be fixed.