In reply to Karma.

Sidebar-less designs are becoming more common in general. But, you are right that it's tough to find a block theme with one. I've built one once as an experiment, but the biggest holdup is not having a nice set of responsive controls for the Columns block yet.

Anyway, there are some other options. Stewart has a left sidebar. It's one I haven't reviewed. Hansen has a Content and Sidebar pattern, but it's not the default. Phoenix has a sidebar, but it was never released to the directory. It was an early experiment.