Why Didn’t Ninjas Use More Shadow Clones?

Shadow and other clones are one of the best techniques but a lot of people don't use it.

So many situations could have improved by using clones.

• Akatsuki using clones at the meeting with Hanzo rather than going themselves

• Kakashi using clones to fight and get intel on Pain

• Exploding clones could be used to kill Obito. Regular clones could also kill Obito by fighting him in the kamui dimension

• Clones are immune to Itachi's genjutsu

• Kakashi could have used clones ro take down Zabuza more easily