Because I use DTTG as my main database, I often store ‘uncommon’ files types in it, such as Omnioutliner, MindNode, etc. It would be wonderful if DTTG could somehow recognize these and just offer to open them in the correct app. (The same could even be said for Microsoft Word documents.)
While I could open Files and open the file that way, it’s often not that easy to work with DTTG and the Files app. For example, I can save bookmarks to specific folders in DTTG and jump to them quickly, but can’t do the same with the Files app. Moreover, I’m usually already in DTTG when I want to open a file, and having to move to Files and navigate to the correct folder/file is less than ideal.