How much portability is there between LR and ACDSee?
Ie do I have to export LR images as TIFFs, or can I somehow move across the DNG+edit-file?
The same question for the return trip of course, in case ACDSee were to go belly-up?
The LR adjustments are definitely lost. You can salvage the end result by exporting to tiff.
I didn't do that.
I'll have a before and after. I noticed I very seldom revisit previously finished pictures. And when your CC subscription expires, only the Develop and Map modules in LR are disabled. You keep everything else. So I'll keep LR installed on the PC. If I want to print or export pictures that were edited in LR, I'll do it with LR.
I imported the LR database in ACDSee so that the searches I'll do will search in all my photography history.