I'm still going to carry and EDC utility blade. I have a ka-bar TDI weak side on my belt and a leatherman surge in my left backpocket. I'll probably throw my CRKT utility knife in my right backpocket next to my keys and keep my self defense blade in my front right pocket for quick access. My main concern is being able to carry it outside of OR, which is why I'm not just buying an auto (no matter how much i want to) as I spend enough time in WA and the occasional trip to KKKalifornia rendering that option, as well as my CHL in the latter case, a non-option.
I've always loved the karambit for both its ease of use for the untrained and its wide range of uses for those who are trained with it, which is kind of why I've drawn to the RBB. I've been leaning towards a tanto until I can get the fox 599 and the RBB combines the blade types in a pretty gnarly fashion. I definitely wouldn't want to be on the receiving end of that knife, but I also wouldn't want to be carrying it if it's junk and has a possibility of not deploying/failure when I need to rely on it.
My main concerns aside from quality are deployment speed and effectiveness as a self defense blade. As far as EDC knives go, I've found myself far less likely to pull my last two blades over the AO I lost a while back. My last 2 edc blades have been CRKT flippers, and while they are of excellent quality, that few extra seconds needed to find the flipper and deploy the blade over the speed of my AO Kershaw I used to EDC is enough to annoy me to the point where I'm hesitant to go for it. They obviously deploy at around the same speed, especially the fossil I edc now, what with the IKBS system and all, but finding the flipper is a massive pain in the ass, and if for whatever reason I needed to pull it in a self defense situation, such as if I were in CA and couldn't have my firearm on me, I'd be at a disadvantage just taking the amount of time blade deployment takes into account. It's definitely not a combat knife.