I carry a peanut every day and it suffices my needs, but in 40 years, there could be times when more is welcomed, so.. for the extra tools offered, and if saks are allowed, an old soldier/pioneer would be more capable. Still, i'd have a hard time missing the peanut...
Judging from what i use a small pocket knife for, i think it will last 40 years with no problems. I only assume..
But what i really need in my knife drawer are just a few really, a small to medium fixed blade, an opinel, an alox sak, a medium stockman, and a peanut. That should keep me covered for a quite some time.