Interesting one if you look at Google Ngram Viewer – usage dropped off massively to 70s/80s, and it's picked back up since but not to 1953 or earlier levels, so even that doesn't explain it.
Must just be the combination of that increase as well as other words decreasing in usage I suppose. E.g. perhaps we're a bit less keen, but also much less passionate, so keen ends up making the cut.
Interesting one if you look at Google Ngram Viewer – usage dropped off massively to 70s/80s, and it's picked back up since but not to 1953 or earlier levels, so even that doesn't explain it.
Must just be the combination of that increase as well as other words decreasing in usage I suppose. E.g. perhaps we're a bit less keen, but also much less passionate, so keen ends up making the cut.