In reply to Justin Tadlock.

Loving Stewart, I will definitely add that to my list of contenders! (I don't love the red text but that's an easy fix).

I have seen Hansen, and dismissed it immediately. When reviewing themes the first thing I do is click on the Elements post and look at the typography. If the text is full-width, it's dead to me. Can I easily change the width of the text in FSE? Yes, sure. But it is an indicator that either the designer put this out in a hurry or they are lacking some design skills that make me not trust that they are careful with the details. Phoenix is the same, but not quite as bad (a bit of margin/padding, but not nearly enough).

So perhaps I should have said, this might be the first theme with a sidebar and acceptable typography. Because I had dismissed Hansen without even getting to the sidebar!

Also last night I came across another one, Responsive FSE that has a sidebar. https://wordpress.org/themes/responsive-fse/ So there are a few.
As the FSE gets more powerful, the theme becomes a bit irrelevant. I'm looking forward to that as themes are the worst aspect of WP (developers say it's speed is the worst...but how much of that's because of poorly developed themes running 30 plugins and a pagebuilder on top of it!?). Right now, the least-adjustable thing about FSE themes are the fonts...so I find reviewing the fonts is a big aspect of comparing these themes.

But WP moves so fast I have no doubt they add more fonts support down the road, and then all themes will be relatively interchangeable.