The most fitting app from my point of view would probably be “Dark Table.” I tried it once but found it a bit too complicated for my needs. I’m not sure whether it offers the same feature set as Lightroom these days.

I’ve been using Affinity since 2016 and it has been a good decision so far. Since Affinity Publisher also replaced InDesign (Affinity Designer had already been sufficient for most things), I retired my old CS5.

At work I introduced the programs to my bosses; afterwards all the computers were switched to Affinity, and none of my colleagues miss the old Adobe stuff.

Only one old machine still has an old CS version installed, just for checking and viewing legacy files — it doesn’t cost anything anyway.