yes, same here, having presets. As an old Bibble user then switching to AfterShot - I know that’s not oss, sorry - I made up scripts which also write side car files (xmp) in which the processing commands for AS are written on basis of camera, lens, f stop, iso, time and measured light (if recorded). This way when AS opens the file it also read in the xmp and processes the there given commands. Thats almost the same like having presets, in the end it just saves one click or so :). As others said with this kind of presets one can get about 80% done.
I’m not very happy how AS is performing since Corel had taken over, so I’m now switching to something else.
I haven’t looked enough into RT or DT but I think this kind of “presets” should be possible there too.
Cheers
Martin