In general, the more cities you connected, the longer it will take you to load into the game because more elements need to be loaded.
Also, in general, our game doesn't cope well with any interruption to the loading process. It will just stop in its tracks, so to speak. Those can for example happen at home when connecting via wlan rather than cable or on route due to package loss.
So, the longer the loading time due to having a lot of cities, the higher the chance to encounter such an interruption and being forced to start loading all over again.
What a load of Bull
Always blaming anything except yourselves....
For a start... initial loading times take longer because of all the rubbish you load into our Cache.
That being said, 99.9% of broadband connections are 99.9% reliable..
How come that in most cases when your game says we los internet connection, it is ONLY your game that has had a problem,,, nothing else we might run gets this problem.
How come I need over 16 Gig of memory to run RN... No other game I have played, or still play, over 25 years of online gaming takes anywhere near this amount..
Cache is the reason... You know, that thing you keep telling us to clear.
If I only run 1 RN server as well as other programs I always have running my cache fills up at a given rate, If I add 2 more RN servers it fills up at nearly 3 times the rate, and if you leave it long enough you get the other thing people been querying... NOT ENOUGH RESCOURCE to run xxxxx
If I don't run any RN servers then it would take months to fill up.
I don't have the 50 city problem, But I do feel for the players concerned and just will NOT accept such a poor reply to any player... which basically says:-
Oh dear.... you have done so well we are going to penalise you with longer load times that your internet connection will most like allow to fail, thus preventing you from playing the game