While one is an enduro style mountain bike, and the other is a touring bike, you're not exactly wrong.

Seems a tad silly since even a small camelback or small fanny pack can carry all the tools I'd ever need for a bike like this and I don't trust any cage to hold a bottle, based on the number I seen strewn across landing zones and the people hiking back uphill for their bottle, I don't think I'll be ditching the pack. Basic tire repair, basic chain repair, and limp it back to the trailhead. It's got a better chance of spending days on a chairlift than being 20 miles from a repair.

Maybe I'll put a rubber snake in there.