Are big law firms facing extinction?

According to the GC for Sun, the days of the one-stop shop are over:

“This structure previously made sense. If you were an individual or business with a legal problem, it wasn’t efficient nor effective to try to identify an individual attorney with the technical skills that you required. So, you would turn to a law firm and rely on them to direct you to the appropriate attorney within their firm to solve your issue. The problem is that this model relies on growth (the need to add additional attorneys) to maintain profitability rather than focusing on efficiency gains. ..

“the epoch of the current law firm model – which derives its profitability from growing scale and raising hourly rates – will soon be over. The firms that will survive and thrive are those that recognize this change and focus on how to maintain margins by focusing on efficiency. .. we recently selected a small number of law firms to support us as “preferred partners” during the next fiscal year. We believe that these firms “get it” and are receptive to looking at new ways to drive down their (and our) cost structure. “