adverb
now (unlike then); now (but it wasn't always so)
Used to contrast the present with the past, often in the pattern 今でこそ...だが... (now it's like this, but back then...). Implies that the current situation is different from before.
今でこそ笑い話だが、当時は本当に大変だった。
Now it's a funny story, but at the time it was really tough.
今でこそスマホは当たり前だが、昔はなかった。
Nowadays smartphones are a given, but in the past they didn't exist.