The columns of red on the dashboard should be fixed or removed from the default display. As things are now, the fact that we apparently expect some builders to be all red hides the fact that we don't expect other builders to be all red.
Right now, linux-amd64-alpine, linux-amd64-noopt, and linux-arm-arm5spacemonkey are all red. Apparently alpine and monkey are expected to be that way - there are long-term bugs open for fixing those - but noopt is not expected to be that. It looks like I broke noopt in CL 74470, but I didn't notice because it just added one more all-red column to the dashboard.
We should make it the case that all-red is always something that needs attention now, not a "would be nice" for the future.