Why Session is a disaster in ASP.NET MVC application?

Question

Why is it being said We should not use Session variables in ASP.NET MVC applications ? I came across this answer which says so. In that case how will i mai

Answer 1

One of the fundamental principles of frameworks like ASP.NET MVC is that they are stateless, just like the Web is. ASP.NET Web Forms is an attempt to mimic a stateful paradigm over a stateless enviroment. It is a lie, in other words.

Using Session variable in an ASP.NET MVC application is a bit like tying a horn to a horse's head, and calling it a Unicorn.