Certainly in the applications i use teh most commonly used featuers have shortcut combos, just like windows, it's just that the keys are different to get there. If you need to move focus to a bar to issue a command then tbh, you can probably mouse it as quickly anyway. I don't quite understand why you would need to set focus unless you were switching between apps
apple:+tab usually does this for me). If I wanted to bookmark this page in firefox, I'd just
+d, I wouldn't bother highlighting the bar in any way first.
What you can't do (I don't think) is alt-f to activate the File pulldown on the menu bar and then scroll down the list to get to the command you wanted (or left or right to get to other menu tabs). As has been noted elsewhere, Ctrl-f2 will get you to the
though which is part of the way there if you really need to do this. Usually the important features within an app all contain their own individual shortcuts though, which is even quicker than, say, alt-f; x (just first one off top of head)
lollage... The User Interface has been somewhat hacked over the years... and in M$ terms, this concept goes back to dosshell on MSDOS 5 from my memory... it's probably older and someone else's idea though...

What you can't do (I don't think) is alt-f to activate the File pulldown on the menu bar and then scroll down the list to get to the command you wanted (or left or right to get to other menu tabs). As has been noted elsewhere, Ctrl-f2 will get you to the

Good god, that's been around since Windows 3.1 (or earlier). Alt key combinations used to be the only way to navigate efficiently. Closest thing to a UI standard in Windows apps from day one.
lollage... The User Interface has been somewhat hacked over the years... and in M$ terms, this concept goes back to dosshell on MSDOS 5 from my memory... it's probably older and someone else's idea though...