I notice a lot of premium sites that are poorly executed.

Either they look off if you dare increase the minimum font size a little (everything will overlap in a mad chaos, menus no longer work, etc. - this happens to the majority of websites out there today), or are unusable on mobile devices because they float large logos and menus on top of page content, obstructing it from view.

It's amazing how despite an abundance of web professionals, there is still room for such poor experiences, on premium websites no less.