Avengers: Endgame was notable for a lot of reasons. Not only was it the climax to ten years of film, but it was also a massive milestone in big-budget VFX work. The sheer scale and polish of these effects is extremely notable. Which makes it a lot of fun when some experts get into a room to talk about it.
Source: io9 – In This Video, a Group of Visual Effects Artists React to the Effects Work of Avengers: Endgame