Daniel 9:21

Probably yes.

There were 70 years in exile.

In order to check how things change in 70 years, just listen music from the 40's and 50's, check the way they dressed in those times, the customs of the people.

In those biblical times, changes happened thru the decades as well.

In order to keep the tradition, not only the making of books (biblical books) was necessary but also continuing the rituals, which were to be kept by the new generations after their return.