But as I got closer to the frontline, I found more frustrating facts. The qubits are fragile, hard to maintain even for a single day, and the number are limited by all kinds of factors. The cost is huge, the devices are sensitive enough to feel the draft of room temperature. Not to mention there are few useful applications discovered for quantum algorithms. The beautiful visions seem to become a bubble, and it could burst at any time.

That makes me feel lost about the future: whether I should stick on this field? If not, where can I go? The most familiar things to me is quantum mechanics, and it's useless for almost every other fields.

Desperate...