One of the better adaptations out there. Gonna attract a lot of GOT and Lord of the rings fans. Video game fans may find it a little confusing as the story is wholly based on the books and netflix didnt actually explain the differing timelines.
Ciri's story is the only one which starts in the present. Yennefer's starts at the least thirty years before the birth of Ciri. And Geralt's at the least twelve years before the birth of Ciri. Witchers, mages, witches, druids, dryads, elves dont age.
So Jaskier in the second series should be an old man if we apply the above logic.
Hmmm... Let us if the filmmaker's would actually go with it or just leave it as a plot hole.