I agree with Dadpool. My truck is 23 years old and my car is 13; my wife and I have been together for, well, let's just say "decades".

So, I certainly understand finding something that "works" and staying with it. But knives are so diverse and needs can change over time. I started with a Vic Woodsman (ancient version of the present Huntsman) that I was sure was The One, but then all the guys carrying Buck 110s convinced me that it was The One. I carried that for decades and even wore out the original sheath. Then I switched to a Leatherman for a few years, but fairly recently went back to the 110. Then I decided it was time to "get with the times" and try a modern pocket clip folder. I bought a USA-made Kershaw, then saw the Kershaw Link and was sure it was The One. I like it, but it's not what I want with me all day, every day. (For one thing, between scraping my watch on the knife, scraping the knife on my keys, or sitting on it, I can't seem to figure out where to wear it.

) Then I decided that perhaps an 84mm SAK would be ideal and bought a Walker (blade, saw, and combo tool). It
is "ideal" for around the property, but not for all the time, everywhere. Then I fell in love all over again with the stockman pattern and it really feels right to me. So, right now The One is
two knives, a "medium" stockman in my pocket at home (and the Walker on my belt, unless I swap it for my Tinker), and a slightly smaller "medium" stockman (and a Vic Rambler) when I'm out and about.
The search for The One can be exhausting!