2 layers doesn’t seem like there are enough tools to make it worth carrying, 4 seems like it’s too bulky, so that leaves me with 3 being OK. I thought for a while that 3 was even too much but I got a Climber nice and cheap on clearance a couple months ago and with the addition of the corkscrew eyeglass screwdriver I’ve been carrying that around. I hardly notice it’s there except sometimes around the house with sweats on it’ll end up under my leg when I sit down. If it had a file that’d be all I need. I like carrying a Buck 501 or a Mini Griptilian, but for the same general size and weight the 3-layer SAK has all sorts of other tools and gizmos so in a practical sense it makes more sense to carry (even though I’d much rather pull a Buck, Benchmade, Kershaw, etc. out of my pocket, they’re not as all-around useful).
Of course I’ve had the same Classic on my keychain for 20 years or so and that’s been handy countless times. The Classic will get me through the majority of the uses I’d call on the Climber for.
If I’m going to need a pliers or think I’ll need something heavier I’ll carry a Leatherman (or an actual pliers), but for daily EDC a Leatherman is too heavy.
But ask me again in a couple months . . . reading through this thread again, I might have to check out the Waiter. For one layer it looks like pretty dang complete and compact.
Mike