Permanent and forever are different things! Twitter could change this policy when conditions return back to normal.
permanent: lasting or intended to last or remain unchanged indefinitely.
indefinitely: for an unlimited or unspecified period of time.
forever: for all future time; for always.
Permanent just means we don't know when some condition will change; contrast with temporary where we do know when it will change.
Forever means it won't ever change under any circumstances.
For example: a magnetized iron nail is a temporary magnet and will lose its magnetism over a predictable amount of time; a permanent magnet can be demagnetized, but otherwise should continue to be magnetic indefinitely; a forever magnet is not a real thing.
permanent: lasting or intended to last or remain unchanged indefinitely.
indefinitely: for an unlimited or unspecified period of time.
forever: for all future time; for always.
Permanent just means we don't know when some condition will change; contrast with temporary where we do know when it will change.
Forever means it won't ever change under any circumstances.
For example: a magnetized iron nail is a temporary magnet and will lose its magnetism over a predictable amount of time; a permanent magnet can be demagnetized, but otherwise should continue to be magnetic indefinitely; a forever magnet is not a real thing.