This is a place where copyright law and theory still haven’t quite caught up, though there are numerous attempts to make laws about these things while just ignoring facts like “To use software one must often copy a significant part of it into memory”.
ETA: There’s usually something about being allowed to make copies of software if it “is an essential step in the utilization of the computer program”, which is arguably an extension of the “transitory duration” clause (which would cover the ‘mirror’ case)
This is a place where copyright law and theory still haven’t quite caught up, though there are numerous attempts to make laws about these things while just ignoring facts like “To use software one must often copy a significant part of it into memory”.
ETA: There’s usually something about being allowed to make copies of software if it “is an essential step in the utilization of the computer program”, which is arguably an extension of the “transitory duration” clause (which would cover the ‘mirror’ case)