[BRX]

I understand the caution, too. But the appeal of a backup without the files (sheets and audio) is that it is quick, doesn't need much space and also therefore is valuable all the more for separate databases. 
I have my sheets and audio dir mirrored on different devices and in the cloud. Also I backup and mirror my database manually (and have high hopes for the sync feature). So you see, why backing up the database with settings but without files is appealing.

A toggle, or settings for the advanced users (maybe even with double warnings "Are you sure... database won't include the files" etc.) would be terrific.

I think transferring between databases with msf files or reimporting is sufficient, too.