Hi Jon
All good reasons!
In terms of the width of posts, I agree with your logic for the main text, but for code windows, it may have the reverse effect? Having said that, if I need to read code from any posts, I generally copy it to a VBA module to study it - so perhaps a moot point.
Don't forget the obligations under the DDA (UK and similar acts in other jurisdictions). Maybe why the vbulletin presentation changed?
cheers
Nick