If I were having a survival knife built, or a tactical knife, or something that was going to have a very, very hard existence, this would be my unquestioned choice.
There are some very good rubber handles. Knives of Alaska uses a material called Suregrip which looks, shall we say, utilitarian, but it’s just what its name implies. It’s very good in the cold, when wet, and when covered with bear blood, or whatever kind of blood you prefer. Dan Winkler, who is now specializing in tactical knives, offers a rubber handle that will win no prizes for looks, but will stand up to anything. It’s the same rubber that’s used to line horse stalls, so if it can take the pounding of four steel shod hooves with a 1,000-pound animal attached to them, plus untold gallons of horse piss, year after year, you won’t be able to impress it much.