Title.
Um, they largely can’t? The Core bag slot is set in the base core code, and the few other times Blizzard has in the past tried to mess with that area, it’s quite literally crashed the game’s build.
Seriously.
The core bag slot is so hard for Blizzard to code changes for that according to past attempts to fix or alter it, the game has crashed the game itself in the past because of changes made.
You know they added slots w/ the authenticator and SMS protection, right?
Yeah.
The question is how far they can push it.
Don’t vulpera also have a bigger base bag too?
e: yes, 8 additional slots, on top of 4 from the authenticator. So they can probably push it as far as they need to.
Yep. It took a while to figure out how to do it without breaking things but they did figure it out. Even if it’s technically messy to replace the bag, they could give us a way of expanding the number of slots.
This is more likely, as I’m pretty sure replacing the thing is out coding wise.
If they were to add a quest chain to unlock more rows that’d be nice.
My bags are bigger. I get extra slots 
Yep increased by 8. Vulpera get 24 bag slots, or 28 with the authenticator four added. Number of slots is no object anymore as the tech issues go.
This thread seems a tad unnecessary 
Replacing the bag in the backpack slot itself.
Not just increasing the number of rows and slots.
Maybe Blizzard can code it to be replaceable soon, or one day?
Dunno there.
However, the claim in the OP is that the core bag, the backpack to the right in the bag slot row, is not able to be swapped out should still be sound.
Oh, is that why they were able to add 4 more slots to the backpack?
So what you are saying is that the current coders are less adept than the original crew?
Mm I don’t think I’d see that as likely. Increasing the slots is one thing, but replacing it is another. The backpack is not a normal bag since it contains our currency.
As you said, I think trying to outright replace it would force Blizz to sift through some really tangled coding and risks wiping out all of our money.
they can push it to the limit…
I think the first attempt to change the core backpack bag slot was as early as BC or Wrath?
So, kinda? Also, it’s like WoW is a large black box.
The coders now know more about the tools available, however the bag slot has apparently become the way the game interacts with the player, so for a long time ANY changes to that area was … considered anathema.
Now, apparently they can add slots and rows? Past that, however, I doubt the actual bag in said backpack slot can be changed yet.
So, it’s kinda this odd place that the Developers of old quite literally stood the game and its gameplay and interactions with and through the player character onto said backpack bag slot?
They should have upped the slots on the primary bag to 30 expansions ago though. Since that has been the default bag build for what 3 or 4 expansions now?
I want bags so big the opened bags take up 2 monitors (and id still fill them).
Maybe the greys and whites that drop which we have to sort through could auto-loot into a kind of “Trash bag” so we can just sell the lot of them with one click and not have to look at the mess that is the rest of our bags?
…
Gee, a “trash bag.”
Hey, Blizzard! Novel concept! Trash bag! Who Knew!?
Excluding the bonus slots mentioned earlier, its been 16 since vanilla.
HJAHAHAHAH are people still simping for this?
Yes they can. They can absolutely replace the outdated 18 year old 16 slot mandatory start bag, without breaking the game.
the number of people who care about that stupid 16 slot bag is insane.
just let it freaking go. blizz compensates by making the other bags we can put in the extra slots larger.
if you can’t get past it, for whatever reason, get a bag addon - adibags or bagnon - that opens your bags as one unit so you can’t see the 16 slotter that bothers you so very much.
ya’ll make a giant to do about a big fat nothingburger.