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by _delirium 4637 days ago
It's shorthand for an end result that is in practice similar. If I fork the project, add new features, and license my new code under the GPL, a user of the forked version needs to abide by the copyleft provisions. They could, of course, continue to use the original Apache v2 code without my GPL'd additions, on a non-copyleft basis, since I cannot relicense the existing code.