cosmos, nor anyone else, gets to call something obsolete on this issue because it's the senate that gets to make it's operational rules, not a president. A president cannot determine this for the senate.
Bill Belichick learned to film signals of opponents from the former Chiefs, and Charger's coach Schottenheimer. Others like Edwards, Johnson and Cowher did too. They learned from the CHEATS and CHEATERS who still couldn't win.