If you join a Regiment in NW (Linebattle) you will see quite a few people playing at once since it's organized but they are usually private events., depending on what connections the leader of the Reg has. As for Warband, I can't give you a definite answer since people are all over the place regarding mods and areas as to where the players are (which can result in low or high ping). If you are wondering as to whether alot of people still play NW, and if you have Warband, I would suggest going to the multiplayer lobby and turning off the module filter and look and see if theres alot of people playing NW. that should give you a good idea. I haven't been keeping an eye out for it as of late. Were you looking for a specific Region you wanted to play with? EU, NA?