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The thing is for most of us here its never "one" blade we have with us at any one given time.

Then you won't really need a survival knife per se.
You'll need a camp knife, a skinner, a small util etc etc etc for each purpose you'll need.
I'm not trying to be pedantic (though I know it looks like I am), but if you will have a number of knives, then you don't need an all rounder, you just need to have the right knives you need for the jobs you'll be doing.
A survival knife is in my opinion a one off all rounder.
The one knife you absolutely can't be without.
The only one you'll choose when the chips were down, the one you chose to put in your bug out bag or survival kit, because it was the ONE you could get by with for all situations, thereby freeing up room and weight for other non cutlery essentials that you could not get by without - if/when you have a choice.