Ok, the first thing I noticed when I installed Safari 4 and opened it is that it uses up 200MB of RAM and 10-20% of C2D just sitting there with 1 tab open. That's completely unacceptable for a web browser. At 10 tabs, it's over 300 MB of memory, and CPU usage goes up even higher. When you use on of the animation features, it adds and SECOND 100MB+ process. So with a few open tabs and the main page running, you are at nearly half a gig of memory and 25% of powerful modern CPU. I know Apple software for Windows is notoriously terrible and they pride themselves on flash over substance, but jesus christ...where does reality check come in?
Second is tab management is just terrible. They get progressively tinier at the top of the screen. Combined with transparent theme of windows, their titles soon become unreadable and half of them go off screen. You end up with a blurry line on the top and no way of scrolling it right and left. You can only use a drop-down menu of the list of tabs you have open. Very annoying to use.
Third, the pretty little tile showing of pages at the start page...has no way of picking the pages you want there. Instead, it uses some Apple voodoo to guess you preferences. This means that when I want to change to appears there, I have no way of doing so outside of going to that page for a month and only then being able to pin it there. Seriously, throughout the development NO ONE...EVER suggested making it possible to type in the sites you actually want there?
As for its speed, I am not really sure what you guys are talking about. Not saying it's slow, but I've never had problem with other browsers being slow, and Safari seems about the same minus the time to display the gay little Apple animations.
So when on the one hand you have this HUGE resource hog monster with completely obtuse design, and on the other hand you have Firefox, which uses 50-100 MB with multiple addons whose functionality Safari does not even come close to including, and IE8, which uses about 10MB/tab (yes that means under 20MB with 1 tab open) and has a much more modern and legible tab management, one has to wonder why anyone in their right mind would ever use Safari.