Quantum computing is not a panacea yet

Quantum computing promises a revolution in scientific discovery. Quantum computing's main advantage over digital computing is in quickly solving highly complex problems that require significant time or resources to process. Currently, solutions to many complex problems can be estimated using supercomputers or pools of servers over days or weeks. Other problems are so complex that they cannot be solved in human timescales using today’s technology. Although research is progressing, there is no guarantee that a practically useful quantum computer can ever be realized.

The impact of a fault-tolerant quantum computer on science and engineering would be vast. For example, it could help the global economy reduce global carbon emissions by finding a better process for producing ammonia than the currently used, energy-heavy Haber-Bosch process.