If, for example, I am playing in Valhelsia 3 and for various reasons this modpack of atoms is eliminated that happens to my world with everything that was made, I sometimes love the work they do with modpacks and I appreciate the effort of atheros for letting it can be used, but I have that doubt
You can still download the world on the worlds page after a modpack got removed.
I also wanted to ask if they will extend their support to modpacks in Aternos or will it be something exclusive to Exaroton, since a requirement to give the green light to a modpack so to speak in atoms is its weight and its dimensions in use of RAM as it does not exist in Exaroton
We didn't discuss that yet, but we'll probably try to provide as much modpacks as possible.
In the past we removed / rejected modpacks which were too heavy and did not work on Aternos because of the lower resources.
Since exaroton does not have this problem these too heavy modpacks might be available for exaroton only.