Alt-W closes connection OR opens tool window
The old beheavor of Alt-W was to open the menu (Window), the new behavior varies.
If a connection is open, then it is closed.
If a connection is not present, then it opens the Window menu.
My muscle reflex when switch between windows was to Alt-W (1,2,3,4), however, that is now very counter productive. And there is no other way to "tab" between windows....
It’s a fair point. Note, though, that there are two other ways to tab between windows: Ctrl+Tab (forwards) and Ctrl+Shift+Tab (backwards) as well as Ctrl+PgUp (forwards) and Ctrl+PgDn (backwards).