Great news. I have all my raw images in Aperture libraries on 1 hard disk and in folders on another hard disk. I currently use raw power on my new images not supported in Aperture but would like to use it on my old images as well in future as I am getting the spinning beach ball to often. Hopefully I will purchase a new computer next year but disappointed that Apple have made the new Mac Pro to expensive for amateur retired photographers like me who have always used tower Mac Pro’s.
I have always used Aperture and always will while it still works. However my big worry is upgrading my camera. I already know several people who have upgraded to Canon 6D MkII and 5D MkIVs and are annoyed that they are not supported even though High Sierra supports these cameras. An Aperture plugin to support new cameras would be grately appreciated by everyone who uses Aperture and still see it as a superior raw converter to Lightroom. I have purchased Raw Power for Mac OS and iOS and plan on testing it out in the near future but would really like an Aperture plugin version.