This is a totally false statement & shows your total lack of knowledge. Let me inform you some things you do with xci so you don't spread more bullshit lies.
You don't need to use a flash drive - hard disk, xci can be copied to a micro sd card & is mounted much like an iso file - this saves installing to the nand/emunand and is much safer to use than nsp. Bonus features for xci - a game can be mounted in CFW, then you can boot into OFW and get the update from ninty servers - you can't do that with NSP or you face a ban. Trimmed XCI files are roughly the same size as NSP - but you don't need the hassle of installing them - which means you can have many TB of games to play instantly and are not limited by nand size/micro sd card size - in the same way you are when you need to install a NSP games.