^forgot to add,

if the program read directly from product .zip files, it would allow you to combine related products to even more efficiently organize your runtime and backups.   say you had 'Bob's Medieval Dress' and 3 related products of textures/fits/morphs. since youd only ever be using the 4 products together, you could combine them into a single .zip file.  this way if you need to uninstall/update/backup the dress, you arent hunting through your runtime for 4 different merchants' unique folder structures/textures/poser files but rather just a single nice clean .zip - which, incidentally, transfers and backs up a lot faster to USB/zip/SSD drives than thousands of little individual files do.

a product update could be accomplished in seconds by simply redownloading the 1.1 or 1.2 version of the product and replacing the old one in your runtime.  with a product like my GND - where the update replaced the textures/face morph/makeups, if for some reason you preferred the old version you could keep its .zip and switch between them easily.