AFAIK, the goal is not necessarily indefinitely long pulses, but pulses long enough to allow for a net positive energy output. This is the reason why there is a

AFAIK, the goal is not necessarily indefinitely long pulses, but pulses long enough to allow for a net positive energy output. This is the reason why there is also pulsed laser research, etc. The bar is high, but we don't need perfection to make a lasting impact.