If the primary purpose of the web site is to offer artistic or visual effects to the visitors, then Flash is recommended.
If it is important to impress the web site visitor with a visual presentation, use of Flash is inevitable. Corporate websites need clear designs, simple layouts so that any visitor could access the information fast and it helps the visitor to focus and understand what you're telling them. Web site is for everyone irrespective of their age, location. The critical aspects behind the success of a website is its user-friendliness.