I think that install time is a non-problem with devmenu at least (dunno the install times with sx os or tinfoil), it's not like the 3DS that would take 30 minutes to install a 8gb CIA, the install times with devmenu were very fast (1 to 2minutes to install a 13gb game).Ok. Non-issue for me. I have a 400GB microSD. Lol
Is there a true universal disadvantage though? I mean yeah it takes more time to install, but how often do you install a game? E.g. I will install Mario kart only once. So install times are also a non-issue to me.
Other than space management and a "for sure you will be CDN banned if you try to update a digital only game without buying it using the switch itself" there's no great con from using NSP.
But also, there's no great con also while using XCI dumps other than having to load the game before launching it.