A license is not bolted to one particular screen forever. It is more like a seat: when a screen retires, its license returns to the pool, ready for the next screen you bring online. You are managing a pool of licenses, not a stack of permanent tags.
This is what keeps a fleet flexible. Move a screen from one site to another, swap a failed device for a new one, or rotate screens in and out as projects begin and wind down, and the licenses follow the need rather than getting stuck.
The idea reaches across workspaces too. When workspaces are linked under a parent, they share a single pool. A license that one workspace is not using is available to another, so a group of teams or locations draws from one set of licenses instead of buying separately for each.