I have been carrying the same 2 CRKT Kasper folders for 6 or 7 years. Before that it was a couple of Emerson CQC7s for 5 years or so.
I tend not to switch up carry gear unless I have a compelling reason.
I do sometimes carry a Leather Man for the all around chores.I've been carrying the same Swiss Army knife for about 15 years. It's the officer version that has two blades, can and bottle opener, toothpick and tweezers. I haven't sharpened it in years, but i never use the blades so it doesn't really matter. I carry a separate knife for cutting tasks, and the Swiss for the tools.