Anyone still using aperture

Yes but not for new pictures. I‘ve kept my 2010 Mac Pro on Sierra, and kept a bootable Yosemite system just in case. Yosemite is the last system that Aperture was supported on. I am using Aperture primarily to clean up my library and metadata (keywords, location data, gps, copyright, description, etc.) and to rename my originals. Aperture handles this really well. All this is to get ready to move images to a new app. I won’t use Photos for the same reasons stated by other posters. I also will not rent or lease an app. That eliminates LR. Capture One is good but expensive. My new go to app for photos is ON1 RAW 2018, soon to be ON1 RAW 2019. I’ve waited 3 years for ON1 to become robust enough to replace Aperture. It does not require a catalog or database to keep track of your files. You organize in the Finder. It uses sidecar files to keep your metadata and edits. Want to move a file? Move the photo and sidecar files and you keep all metadata and edits. Want to search across all your images? Turn on the catalog feature - it will collect the data from your sidecars. Non destructive layers, coming soon. Lens corrections - already there. New camera, they probably support it. Plus you get all the stuff ON1 has always been known for like presets, effects, LUTs, panorama, HDR masking, etc. Moving to a PC because Apple won’t build the machine you need. It works there too and your license already covers both. If you haven't looked ON1 recently I recomend you do so. Their is so much more, but this post is too long already. BTW, I am not affiliated with ON1 other than as a customer.