I have probably around 2,000 blades of many different types. Mostly Russian produced of Gillette or one type or another. I'm thankful I discovered the RR GC razors because for some reason blades like Sharks, Treets, and Vokshod which I disliked previously work well with the GC. I find it to be a blades agnostic tool that works and now I'm set for years. Even if Nacets, Gillette Silver Blue, Perma-Sharp, and Platinum hypothetically stopped being produced as they have been in terms of quality I'd be OK. I also recently discovered Ladas blades and could manage with them too.