I find this very tedious compared to Windows. When I select the app switcher (Command+Tab), Safari (for example - it happens often) is available, but when I select it no window appears, only the menu at the top.
The only way for me to open the app is to either click the app at the bottom, or use a keyboard shortcut to open the window (e.g. Command+N in Safari for a new browser window).
Has anyone else experienced this? What am I doing that is different to how Apple would expect me to switch between apps?
As I understand it the app itself is not closed, there is just no window open currently, so the app switcher gives you the app i.e. the toprow with all the options. You will have to open a new window yourself.
I never use the app switcher myself and switch either with mission control or spotlight search.