Any thoughts about making the columns more than three?

If you make the columns number adjust according to the site width size, it would benefit the people who have their site set as 100% width. I think 5 columns is what you need for large displays. Tablet needs three columns, mobile needs one or maybe two columns. Desktop and TV definitely need more than three columns for 100% width so everything isn't stretched out. For example, the featured images of the posts. A 4 or 5 column grid would be perfect.