I agree with mh-- if there are real compatibility issues or weaknesses, then those would be a good reason to switch curves.
If there aren't, sep256k1 seems plenty good enough for the forseeable future. I think most programmers (myself included) have a tendency to worry about small-probability "what if" problems that we know how to solve, when we'd be better off thinking about high-probability problems that we don't want to think about because we don't already know how to solve them.
Like multifactor wallet authentication so trojans don't steal users' wallets....