https://ci.chromium.org/p/chromium/g/luci.chromium.fyi/console
displays 73 builds. Is this dense?
there is some scrolling on macbook though. Some of these columns could be made shorter, e.g. by shortening "closure_compilation" to "cc" or something.

would this work? 
we tried vertically-oriented text, it looked weird 

ah, from reading bug 903493, it seems you don't really need columns in the top, but rather 140 named boxes in a [row associated with a commit], potentially overflowing.

Right. Generally speaking, we need to be able to see the names of the builders in the high density mode.

how many of 140 post-commit builders are critical? if we had one console for critical and one for non-critical, how wide would that be?
Where can I see the list of 140 builder names?

Here is a view of the current release builders.

https://cros-goldeneye.corp.google.com/chromeos/legoland/builderSummary?builderGroups=release&limit=1&buildBranch=master

On the link that Don provided, the greyed out ones are non-critical. Names are there too.

If we had one console for each, it would be too wide: you'd have to scroll-left-to-right.

We're working on bringing the post-submit builders up right now so don't have that in the UI yet.

From an offline discussion yesterday, this can be augmented in the existing console view (as a separate view) with about 3 changes:
* Allow stacked builder bubbles in the rows, hiding builder summaries
* Export "master-run" information for child builds in the source_manifest
* Introduce index_builder, where we determine rows by builder history rather than gitiles.