With regards to the boxed layout of the forum this was/is very much the initial “Look & Feel” of the site. What was important was/is to get the core functionality working correctly and remains my priority.
I can and have changed the font size on the forum, but not too much otherwise you get word wrap. Currently the main item which limits the width is the heading which currently is a fixed size image, but when I have the time that will be changed.
The initial goal was to allow the forum to work on as many devices no matter there size which is not straight forward, so this is my initial compromise.
What you can do in the meantime which I do is use the browser display expansion in percentage which works well, see below in Firefox for example.
