Hi Salvo,
Currently, that's not a built-in feature in Trello, but I can definitely pass your interest to our team as a feature request on your behalf.
Also, there is an alternative you could try to use in the meantime. For example, one of our community users has created a JavaScript script using Trello's API, allowing users to do a bulk deletion of all their archived cards on their boards. People enjoyed this alternative, and perhaps it's worth checking out here.
You can also check more information about this script on this community post here.
All the best,
Sal
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