Was there a competent patch submitted about keys and was this discussed in public? I imagine you can't just drop the keys in a random text file, it must be protected like the passwords file.
You still need to protect from getting updated by errors or malicious code. For apt you have utilities to edit the keys you don't edit a test file by hand.
No idea, but honestly I would not spend my time on writing such a patch yet , only if I intend to create a great snap store to rival Canonical , otherwise we have enough working alternatives for all use cases that are not about third party binaries that are reviewed by Canonical.
