What is the 1 single EDC you would keep? Please post your photos if you've got 'em. It's a serious question as I'm not opposed to moving around the chess pieces of my insane board.
This might be my choice. The Benchmade 565-1 Mini Freek in S90V. It's lefty friendly, lightweight friendly and ridiculous edge retention.
Possibly my Chris Reeve, small 21, lefty, micarta inlay, double naked thumb stud that I carry in a leather sleeve.
In a survival situation though I'd keep only my Leatherman Wave+'s, full bit set, extender, Nichia emitter torch on the side in extended pouch, but carry in my manbag/murse/bugout bag.
Please don't take this as a flex: I certainly don't at all. I bet anything that many of you would have similar dissections of your accumulations.
Young people: Take it from this older guy in his 50's. Don't do this to yourself. It's stressfull as I downsize. This doesn't include most of my kitchen knives, whetstone/sharpening bin, photography, scuba, camping, fishing, tools, hiking, audio. It feels endless as I pull out bin after bin. This project had multiple goals: help me get this stuff back into the correct bins, photograph for insurance purposes, decide what to list for sale, confront myself with my reality.
This sort of thing can be a real burden on those left behind. Not to be morbid, but I'm trying to get a handle on this for my heirs.