Hey guys i was just wondering; after the update, did the phone permanently delete all of my installed apps? or did it just hide it or something?

and if it did delete all of my apps, which i don't really mind, did it free my installed apps memory? after the update i only had 1.8gb. is that the standard size after the update? i wouldn't want the update to just hide my old apps, and let it build up and waste my installed apps memory space..