Hi Nik,
does that mean that even I have migrated my Aperture library to Photos several years ago, I will lose all the edits and be presented only with hard-baked JPGs once I will update the OS to Mojave or Catalina? I understand you are still investigating all this, but it would be insane for Apple to do this. That would be another proof point that users should avoid locking themselves into an ecosystems of catalogs, libraries and all this stuff. Hence, the better Raw Power will deal with these aspects, the more people you can win over – see the other discussions we have had around the Raw Power sandbox directory and integrity of the modification data therein.
Best regards,
Erik