I guess the very fact that LINQ is so many things makes such discussions a bit annoying at times because everyone refers to a different set of features. Is it

I guess the very fact that LINQ is so many things makes such discussions a bit annoying at times because everyone refers to a different set of features. Is it the SQL-like query syntax? LINQ to objects? LINQ to SQL? Expression trees in general? Expression trees and LINQ to SQL/EF/etc. are hard to find elsewhere. The query syntax often doesn't seem to be that big of a deal, especially since not all methods are available there, so pure query syntax often doesn't work anyway.