[klodolph]

By “new trend” are you talking about how the borders got eliminated in Mac OS X in 2001? That trend is old enough to buy beer.

Although for a while (starting with 10.3?), some windows had a chunky brushed-metal look.

[Rebelgecko]

IIRC it was around 2010 that Apple started getting rid of scroll bars by default

[lelandfe]

That would be 10.7 Lion, in 2011. But I believe OP was talking about the older window borders, which afforded the ability to drag the window from any part of the perimeter.