Being confused about some SVGs displaying nicely in DEVONthink while others don’t, I have an idea how to possibly mitigate this in a general way:
Couldn’t DEVONthink show in the document view as “Best Alternative” the output of the QuickLook plugin for this file format if a plugin for this file format exists?
I don’t know whether this is technical possible, but it would be super-handy for these file formats (or special cases of file formats) DEVONthink cannot handle directly.