I am thinking about organising personal memories. I have some videos, photos and documents that I would like to store. DevonTHINK seems to manage most formats just fine (which is no small feat), but the DNG rendering is broken. I don’t want to duplicate (i.e. export a sidecar JPEG with adjustments) the files as that makes my life more complicated. I have used Synology Drive on my NAS, and that is able to use DNG thumbnails. I believe that exiftool can extract it.
As for EXIF / IPTC data, that would be an incredible addition to DevonTHINK. Even starting out with reading (not writing) a few fields would be amazing. But I understand it is not a priority for the developers, and that is fine.