Can Classic & Redwood page co exits? Can we transact partially in both the pages?

Summary:

1.We have 2 work order pages in manufacturing one is classic and other one is Redwood. can we use both at same time?

2.we have some setup pages which have both classic & redwood. we don't use these page on daily basis though..

3.We have an issue in one of the pages "Report Material Transaction" when turned in redwood where we are not able to return the item with a specific revision# we are not able to select the rev# during return then we flipped to Classic page. can we have other work order pages in Redwood and specific pages having issues be in Classic?