What do modern layouts look like?

Question

Adobe Illustrator

Hello, Nekto_Habr talked not so long ago , As for the choice of hardware for Photoshop, he says that there are modern layouts that open in modern Photoshop, but he did not want to demonstrate a modern layout for two gigabytes. And explain what kind of layout this is.
Maybe someone came across a modern layout from 2017, which weighs two gigabytes. If it's not difficult to explain what layouts can be of such a volume, and why are they so demanding on modern Photoshop and hardware?
By the way, here is the link of our discussion
Is it worth taking an old Macbook for Ps, Ae, Ai?

Answer 1

2 giga can weigh not a modern site layout, but a PSD file with a bunch of non-deleted layers and a bunch of huge photos in smart objects.

Answer 2

I personally saw a Photoshop file of 800 megabytes in which there was a billboard layout 3 by 4 meters. Perversion of course, but in general it is possible.
If, in essence, it is hard to believe in a site layout of 2 gigabytes. This is how much you need to be crooked or how many artboards you need to throw ....