More widened posts/ability to hide linked topics in right gutter?

Could there possibly be a feature in which you can hide the linked topics in the big gutter that is to the right of posts in a topic? Or is it already there and I don’t know where it is? One of the few things I don’t like about Discourse is that post widths are sort of… cramped. Any way to make it more roomy?

You can do whatever you like with the CSS widths.