> When a publisher has no incentive to keep an edition in print, it should be available to any other publisher to print

How do you adjudicate that? And wouldn't it just lead to loopholes such as "Ghost Printings" (cf. Ghost Flights https://en.wikipedia.org/wiki/Ghost_flight_(commercial_aviat... ) where the books are technically printed in the required volume but practically unavailable to customers through one method or another. Because, the cost of wastefully printing a few books to warehouse, is less than the potential losses of the IP rights, probably.