Tables don't lend to responsive layouts. If you've got a stereotypical layout with the middle row having a main content and sidebar column you can't really reflow that sidebar below the main content on mobile. With block elements (divs or semantic blocks) and CSS it's super simple to collapse multiple columns down to a single column for mobile. It's also simple to redo the same layout to handle super wide displays as well.
Tables for layout were fine back when everyone was browsing the web on SVGA, XGA, or even SXGA screens at 96dpi (72dpi on the Mac). Now a visitor might be on a high DPI display in portrait orientation, full screen on a 4K monitor, or anywhere in between I think it's a bit disrespectful to visitors not have have a responsive page layout. Tables are a liability for responsiveness and should only be used for tabular data.
Tables for layout were fine back when everyone was browsing the web on SVGA, XGA, or even SXGA screens at 96dpi (72dpi on the Mac). Now a visitor might be on a high DPI display in portrait orientation, full screen on a 4K monitor, or anywhere in between I think it's a bit disrespectful to visitors not have have a responsive page layout. Tables are a liability for responsiveness and should only be used for tabular data.