I don't have a replacement at all but this coincided with a reduced desire to tinker with and touch up my photos in general. I'm currently working on a modular Unix-y/CLI-focused way to safely ingest photos (archive originals with PAR2; then move from source and rename), reject/rate as needed, ensure timestamps are correct (UTC for DSLRs), geotag with whatever GPX I have, and then eventually some sort of LLM-based tagging. Exif will do a lot of heavy lifting here.

All I really need now is a way to rate my photos and I'll probably use Digikam for that. Raw processing doesn't have a CLI solution that I like so I'll probably have to use RawTherapee or something as well.