The suggestion here - I'm not a user - is that just the installation package is complete and up to date. How is that different from uploading the latest WordPress to your server and then seeking out the different add-ons that you need? With the right protection all themes are hidden, as far as coding goes, from casual view, so little real advantage for commercial themes there.

The one bonus that I can see, for those who build many different sites with WordPress, is that a package can be saved for one site and another for the next. The saving is, I take it, on someone else's server, which saves space.

Other advantages? Sorry, but to be honest I see few.