In the blog post, Updating Navigation for Stack Overflow, Enterprise, and Stack Exchange Sites, we are introduced to the concept for a new left sidebar for navigation. This blog post does indicate that they are attempting to address concerns of users with smaller screen sizes:
What about people using smaller screen sizes? Adding a vertical left navigation increases the page width, and how will we support people across a range of screen sizes and devices?
But the only mention of smaller screens in the remainder of the post is in relation to tablets and mobile devices. It seems to skip over explaining the experience for users with smaller-resolution screens on actual desktop or laptop computers.
Right now, the site is fixed at about 1100 px wide. Many users over the years (as early as 2009 & a good one from 2012) have requested a fluid site design that allowed for wider browser windows (larger screens) without leaving large margin bars on the sides. These requests have been repeatedly declined, preferring to keep the static page width layout for various valid reasons.
So, my question is, will we be keeping the ~1100 px width, which is good for most (though not all) full site screen sizes (not including tablets/mobile) or will we be moving to a fluid design (despite previous reticence) or increasing the page width (say to 1250 or 1350 - 1366 x 768 was apparently most common size as of 2012) to allow for the sidebar... but potentially affecting users on smaller-width screens?