sure, but I prefer this layout to majority of big tech today.
Gives me flexibility and choice and does not punish me with 600px wide content box because majority of users have trouble grasping the concept of window management.
Fair enough, I'd say for niche content it may be okay, but for targeting broader audiences I'd guess you lose many readers with that readability on fullscreen browser windows (what most people will have in front of them while surfing I guess).