Our first tests with ZIP file deployment ended on 1 GB size limit. However this article http://stackoverflow.com/questions/6738773/zip-files-with-java-is-there-a-limit says the limit may lay elsewhere.

So for each product we need to find out what is the number of files and the fact if the unpacked size exceeds 4 GB. If not, it would be a good idea to try deploys so we do not have to deal with fragmenting the ZIPs unless really necessary.