In Game of Thrones S8E05, "The Bells", Dany uses Drogon to single-handedly burn
the whole city of King's Landing.
This seem well within the capabilities of a dragon, except for
the fact that the breath blows up walls and other stone constructs as if they were made of straw!
I cannot remember the breath of a dragon being described (books and show) or shown (show) to work like such before.
Since we have a fire-breathing dragon, I suppose realism has to take a back-step anyway. Is Drogon's breath consistent in universe?