I would miss it for `let`, and for multiple `from` clauses. These are things that can be done with extension methods and callbacks, just not as elegantly.
If you look at how a LINQ query gets translated to a method chain (e.g. via SharpLab or let Rider/ReSharper rewrite them) you'll notice that multiple `from`s or `let`s can become quite ugly.
.Select(x => new Employee { Name = x.Name, DepartmentName = x.Department.Name }).ToList(); .Select(x => new { Name = x.Name, DepartmentName = x.Department.Name }).ToList();