It would be cool to see an RB server on UT4. The community is slowly fizzling. I don't think anyone plays CTF anymore. Mostly a new game type called Blitz. And a lot of Elimination. So the time is right to get a CTF server going again. RB might be the unique server to get people back into it again. So it'd be a win-win. Just need the players. :)
I am definitely excited to get RB into UT4, especially seeing as word is getting around all of a sudden. 5 new users in one day is a new record. Glad you're here.
I don't feel like UT4 is in a state where a server could survive, though. The RPG mod is out of the question right now due to technical limitations. I could probably produce simple mods like a 2k4 movement style or custom weapons. Really I'm holding out for the official word from Epic on if the game will even be continued. If I could find an affordable host I would try it out. Right now getting a dedicated server isn't economically viable.