I am in a bit of dilemma since I started trying to collect complete in box, or what I consider to be (Cartridge, box, & manual). I understand many don't consider this to be complete, and I understand that since it is missing extra inserts, etc. For the sake of not listing here what I already have CIB, I will narrow down my scenario to my SNES games examples.
IMO if the extra inserts do not include exclusive postcards with the title of the game or an exclusive poster or anything that isn't inside other games. Just a manual box and cardridge is complete in box than in my opinion.
Because the missing inserts/ plastic baggies where pretty much in every game pretty easy to replace not unique for that game only. if you are a cib collector and you won't buy a game for a deal/good price in pretty much excellent upwards condition especially the box because a common insert is missing wich a ton or pretty much all other games have your an iditiot. There are some of those I assure you. Some collectors don't have logic.
Sure some basic paperwork was either in early or late games from that console era, but again ridiculously easy to replace.
IMO extra inserts only apply towards the cib status if it's unique for that game specificly.
Still if your hoping for a bubble to burst, cart only will happen way sooner than cib. kinda slim pickings for the nice condition cib stuff.
I think he is referring to game-specific items. Many SNES games, particularly RPGs and Strategy games came with maps and data charts. Many of them came with posters as well.
As a SNES Collector myself, I have a mix of CIB, cart and box only, or loose cart games in my collection. I try to get CIB when possible, but if the price is outrageous... well, I'd rather spend that money on more games than cardboard.
I have been gradually getting clamshell cases like this for all my loose carts though, because it looks sharp on a shelf, and opening them reminds me of renting a game in the early 90s, and I love that hit of nostalgia. Image isn't mine, just an example I found on google.