Missed this announcement earlier this year by Jiri but he has been hard at work updating Hyperlobby after a 7 year hiatus.
HyperLobby 4.3.7 development thread: HyperLobby 4.3.7 development thread - HyperLobby Online System
HyperLobby 4.3.7 development thread: https://hyperfighter.sk/ftopict-10445.html
Other than IL2:Original, are there any sims that Hyperlobby would serve? Personally I wish all sims used HL as their MP front end. But that ship sailed away in 2010 or so.
Hyperlobby used to be compatible with several sims but I think it is basically just IL-2 compatible now.
List of games that used to be supported by Hyperlobby.