I don't recall (and haven't gone looking) if I said anything, but my initial assessment of Digikam (on Linux) wasn't positive.It was _yet_ _another_ piece of photo software that wanted to index photos before letting you do anything else. And indexing...takes a while.
But I came back to it today, and...it runs smoothly. Moving around photos and folders is fast, not getting bogged down. Tagging and tag search works well. A bit of poking around and I was able to get it to import earlier keywords too. So, yep, worth giving a bit of a chance. I'm on version 8.4.0, there's an 8.7.0 out so will look to upgrade.