D2 Years Later (Diablo 2)

Not so long ago, I was again swept by a wave of battles against evil and the salvation of the world of the sanctuary. After many years, I went through this game again (and not in one Persian). It was very interesting to fight shoulder to shoulder with comrades in the battlenet for peace and freedom and to eradicate evil spirits. We've been farming, collecting sets and creating powerful rune-worn armor. Having defeated Diablo, his relatives and henchmen, the question arose, what next?
After reading the forum a little, I was surprised that people farm the same location for hours, days, weeks. And actually, the question is, why? Why dress up and get things like anihilus (or whatever)? Is there any result other than "I have achieved this, I am a fine fellow / nerd".
Using the example of another game, for example la2, they farm ammunition to capture castles and territory, and then hold them. Or to get the title of the strongest - a hero. 90% of PVP had a meaning, apart from "who is cooler" - they mostly fought for dominance in a particular area of ​​the game.
So what is diablo2 farming for in 2021?