Keeping the server on a deprecated/outdated game with the other large communities moving to reforger or arma 4 would be a great way to kill the playerbase. Even though reforger is early access it still almost plays better than arma 3, with the bad parts for me being combat and lack of guns and vehicles in the base game. Also new engine has a non scuffed scripting language that anyone with a moderate level of programming is able to learn quick, so dev shortage won't be as much as an issue.