So the vertical format is to accommodate the Substack Live, which is only available in the substack app, which is not available on computers, just phones and tablets...?
At least you're also streaming it on YouTube so a recording is available. The substack live show you did last week was not available after the fact, and by the time I figured out where the hell to find it, it was too late (it did not show up in Notes, just in an email notification that I found after the fact).
If this vertical format works best for you guys, then, by all means stick with that, even though it's really hard to see screenshares of articles, and I'll miss the beloved MST background. Just please keep the parallel broadcast on YouTube so a recording is available.