Backpacks can be exploited to store backpacks inside of backpacks
(you can see where that can go)

cant you just turn that off?
thats what they did on another server

147th time of voting against this suggestion

Literally just use a minecraft vehicle

Heavily exploitable, 1 dub of backpack filled with goodies is not healthy, zaify can implement only 1 backpack for inv, but chests nah..

As mention above, it's easily exploitable. If any possible type of item storage would be added, it would probably be the Bundle which has less ability to be exploit when compared with SF backpack or Shulker Box. Nevertheless, It's still highly unlikely to be able to use such.

you could have it so that backpacks can't be placed in backpacks, just like the shulker box,
and you would only be able to have one functional backpack in your inventory

Backpacks will not be implemented

The only "backpack" i could see being used is the ender backpack

Me omw to downvote this suggestion for the 16177818th time due to it's exploitation for extra pots and such.