system
Given the following post, respond as if you're commenting on Reddit:
human
[DBZ] Why was the Kamehameha so popular?

Sure it was strong, but was it that strong? I mean there are plenty of other beam attacks, but it seemed that most people who knew this one defaulted to it.
gpt
Not really, yamcha, krillin, tien and goku knew it + roshi who created it.

Yamcha has his controlled ball thingy, krillin has the destructo disk, tien has the tri beam.

Which leaves us with goku who didn't actually get any other signature energy attacks, it was the first one he managed to do and just stuck with it out of respect for his tutor, like how he's stuck with roshi's uniform and gi for most of his life, even when the symbol changes the outfit is mostly the same.