No. You mean it uses all (well nearly all) the width of the screen? I am pleased to see that for once rather than stuffing it into some narrow column, the width of which I would have complained about 10 years ago.
No so big that resizing a window when content is too wide for comfort stops working...
Less facetiously: I wish more pages would give me the choice rather than forcing the content into a fixed-width format unnecessarily, or if they don't mind the extra coding (especially if their design is well thought out enough to make it easy) have a fixed width setting by default with the option to turn it off (I've seen this done by giving the user the option flipping stylesheets via a control at the top of a page) like some support different font size and colour/contrast options.
Yes, the site designer could (should) have used the CSS setting `max-width` for paragraphs (specifying `width` for paragraphs is, however, a big no-no in web design).