It could be exciting to open up the other air traffic in Europe and elsewhere in the world.
It is always the same airports that are busy and open (Ex. EGLL, KLAX, KJFK, LFPG, EHAM) in training mode.
If these shut down in ex. a week, it might help to spread traffic to several new exciting airports.
and ultimately increase the joy of flying and playing in the app.
ATC on Training Server is not regulated.
Anyone can open stations anywhere in the world whenever they want.
Shutting down certain areas or airports is not an option.
The thing is that ATC is only useful (and fun) when there is actual traffic, so that’s why busier airports tend to get active ATC.
Feel free to open other locations whenever you want.
You could also communicate that in the Live category to try to get others to join and generate some traffic.
Don’t forget that Training Server is a learning environment.
Learning is often done by repeating things.
Getting familiar with an airport is part of that.
So that’s usually why the same interesting and busier airports are often used.
It’s just a great learning experience. :)