Cardboard, cable, carpet, drywall, twine, plastic packaging and tape, letters, tags on pet toys, pillows, - a good knife made of a modern super steel can be a revelation. Get a good one and keep it handy, and you'll find situations daily where it genuinely makes life easier. For tech people, something like Leatherman skeletool is the ultimate every day carry because of the multi tool, and you can buy custom blades made from powder steel.

For real. I have a tiny swiss army knife that cost like $10. I use it to open packages, and I keep it in my pocket's pocket. (You know, the little flap thing that's in your right pocket for storing loose change or whatever.)

Carrying around a knife that large seems miserable. I already wince when I wear pants that don't have a pocket-pocket (lol, I should probably find out the actual name). Carrying around a 4.5" knife is like ... why? Where do you keep it?

Open packages, cut boxes… various projects. Strip wires in a pinch. Improvised tool if one of the motorcycles I own from the 1980s breaks down.

I do also commonly keep a leather man wave + in the same pocket.

Other pocket tends to have car key, chapstick, streamlight, and a mala.

Edit: I will say I’ve brought the flash II with me to at least 5 countries, and have used it to also once cut some chambira while on a boat on an offshoot off the Amazon river.