Why is flyback converter(DC to DC converter) called so and what are its main advantages over other techniques?

I did a project of a power supply unit which employs flyback conversion techniques in which the external asked me this question.

Answer:
The best explanation I've ever heard is that it was
named from the similar circuit the "flyback
transformer". This is what is used to provide the
low-power high-voltage needed to drive a CRT. The
name comes from this use where a sawtooth wave drives
the transformer to build up a voltage to draw an
electron beam across the display. Each time it switches
off, it causes the e-beam to "fly back" from the right
to the left of the screen.

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Why is flyback converter(DC to DC converter) called so and what are its main advantages over other techniques?

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