Technology, security and changing demographics will impact legal practices. Kansas City—home to several large firms with national reach—has seen the big players grow even larger thanks to a series of mergers. During the past two years, for example, Spencer Fane has opened or acquired offices in Phoenix, Dallas, Oklahoma City and Denver. Similarly, Husch Blackwell merged in July 2016 with Wisconsin law firm Whyte Hirschboeck Dudek to broaden its Upper…