system
Given the following post, respond as if you're commenting on Reddit:
human
What, if anything, could replace binary based computing?

Additionally, are there any signs that it does need to be eventually replaced?
gpt
Binary is used for many good reasons.

One is it's very easy to represent two values with two voltage levels, and the more values you want to represent, the more difficult it is to keep "noise" from making them look like each other.

Another is that even if you built a ternary computer (and they have existed) you're not really gaining expressivity. We can build programs for binary computers that do the same things that you could do in another numeric base. We already do.

Finally, newer computing paradigms - quantum computing, for example - are also easier to represent if they're treated as extensions of binary. Quantum computing represents computing as sets of states that can be "superimposed" - multiple states simultaneously. This uses a model of computing where the "quantum bit," or "qubit" is the analog component that corresponds to the bit in digital, traditional computing. 

Numerically, though, this is not the same as choosing a different base to work in (like substituting three-state computing or base-10 for binary) - it's actually modelling computing in terms of probabilities and all the other strange behaviors quantum mechanics give rise to. *Importantly, a binary, traditional computer can do everything a quantum computer can,* just not necessarily as efficiently.