No offense but if fortnite is exclusive to Unreal, quite a bunch of people out there already have the launcher.Because there is no competition. None of these other launchers have provided any valuable service to customers that Steam wasn't already doing since they were created. The biggest myth in gaming is the bullshit "competition is good" line that gets parroted EVERY TIME one of these pops up. You'd think by now people would realize just how little other clients have offered anyone but I guess not.
It's kinda why no one gave 2 shits that you had to have battle.net for Diablo3 or Starcraft or whatever.
I doubt that this is really that much of a problem outside of the Steam hardcores.