I have no idea if it can’t load aperture libraries or not. I have never used it. But Darktable as a photo editor is the by far best one that I’ve used and I used CaptureOne and Adobe Trashroom previously. Short version is that it uses a scene-referred workflow which guarantees consistency between pictures and is basically the same process that colour editing software in the video world uses, while all other photo editing software basically only uses a display-referred process, which is a problem, since it applies a base curve and turns the raw file into a higher quality JPEG and then you only edit said higher quality JPEG, this is horrible for consistency and predictability. If you use the “recovery” option in Lightroom, you know what I’m talking about.
If you start out with Darktable, there will be a slight learning curve because every YouTube video has taught us to use curves upon curves upon curves. Which again is a problem because you’re multiplying errors. But I digress. Give it a try. It’s free to download and if you don’t like it, you don’t have to use it. I gave it a try, and I love it. But well, horses for courses.
Thanks. :)