What are the downsides of using SqlServer Views?

Question

What are the downsides of using SqlServer Views?

I create views frequently to show my data in a denormalized form.

I find it much easier and therefore fas

Answer 1

The following is a SQL hack that allows an order by to be referenced in a view:

create view toto1 as 
select top 99.9999 percent F1
from Db1.dbo.T1 as a 
order by 1

But my preference is to use Row_Number:

create view toto2 as 
select *,  ROW_NUMBER() over (order by [F1]) as RowN from ( 
select f1
from Db1.dbo.T1) as a