Victron mqtt brokers

In this post MQTT local & via MQTT broker - VictronEnergy from the old forum it is described that you have to connect to the correct broker out of 128 to communicate with the cerbo. Is this still the case?

I want to make a program for communicating with multiple cerbos over mqtt and thought I had to make one connection per broker they use. However when I tested today I could subscribe to any cerbo over any of the brokers. Is this correct behaviour now? I could not find any information on if connecting to the correct broker is still necessary.

I was also wondering if there are any limitations or blocks if I subscribe or publish to too many cerbos over one broker?