It is currently impractical to include a duplicate of some high value items in the IBTN bag - I can grab these and stuff them into my main bag, or a second one, with about 15-30 minutes notice.
The IBTN Bag. It's better than nothing! Have had the "Grab what I need on the way out" mentality for a long time. finally starting a proper BOB with a discount backpack and spare gear. Costs are only for items purchased specifically for the bag. All else was already on hand with outdoor gear.