Shift + Click on the solo button removes all active solo on all the tracks. Shift + Click on the arm button would be really great to remove all the armed tracks.
In big projects it’s very easy to miss one active armed track. You might record something on a track and not see that another track is armed at the top of the project, which will cause a loss of the arrangement on that track. If there was this shift + click on the arm button to remove all armed tracks it would be very quick and simple to remove them all and avoid loosing stuff on other tracks.
I’m not sure but it probably fits well since it’s already possible to do this with the solo button
There is a shortcut to global arm off.