> I don't understand why today is the right day to allow weaker RSA
keys.

I don't think that changed. To recap (and these changes are confusing,
yes, but this is my understanding of the final result):

# Noble release
- there is only one list of crypto algorithms: Assert-Pubkey-Algo
- anything NOT in that list will trigger a WARNING
- RSA 1024 is NOT in that list, therefore we have a WARNING

# This SRU
- there are two new lists: Assert-Pubkey-Algo::Next and 
Assert-Pubkey-Algo::Future
- the behavior of Assert-Pubkey-Algo CHANGED: now, algorithms not in this list 
will trigger an ERROR instead of a WARNING
- algorithms NOT PRESENT in Assert-Pubkey-Algo::Next will issue a WARNING
- RSA1024 was ADDED to Assert-Pubkey-Algo, so it's allowed
- RSA1024 is NOT PRESENT in Assert-Pubkey-Algo::Next, so a WARNING is triggered

In summary, RSA1024 triggers a WARNING in both noble release, and with
this SRU.

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https://bugs.launchpad.net/bugs/2073126

Title:
  More nuanced public key algorithm revocation

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