On Wall Street, a high-ranking few still avoid email

This group, which includes top bankers like JPMorgan Chase & Co Chief Executive Officer Jamie Dimon and powerful investors like Carl Icahn and Berkshire Hathaway Inc's Warren Buffett, were eschewing electronic communications long before the probe of U.S. presidential candidate Hillary Clinton's emails and the recent hacks of her campaign manager's account made headlines. Some on Wall Street are nostalgic for a time when in-person conversations or phone calls were the norm, but others believe