Are there any cases of Illegal Building in an official lego build? I am defining illegal as it is in this answer, specifically the following


Studs-on-side bricks cannot have their side stud in the hole of a
technic brick
Bricks mounted SNOT style onto Ehrling/Headlight bricks cannot sit
directly above a normal stud (the minimal height of the LEGO
embossing makes that combination illegal)
Technic pins have to be fully inserted into technic holes, otherwise they stay in compressed state which causes stress on the element.
Plates cannot be inserted with their studs into technic bricks, unless it is a 1x1 plate (so only 1 hole is used) and there is no brick attached to the technic brick directly above the inserted plate.
As mentioned by you already, you cannot insert plates between studs (this used to be a valid technique 20+ years ago, but is no longer considered &quot;legal&quot; by LEGO).


I am also including one other situation:

A round piece between four studs as stated in a comment by Sandra.

When, if ever, have any of these methods been used in an official Lego Build?
As mentioned by you already, you cannot insert plates between studs (this used to be a valid technique 20+ years ago, but is no longer considered &quot;legal&quot; by LEGO)

This technique is used in 21309 Saturn V, to mount the flag piece as part of the moon diorama.
Given this set was released in 2017, I’d say its definitely a modern usage.