how exactly do you propose someone looking to delete all of their old posts from a dead instance might obtain the exhaustive list of instances that have historically received their posts via a long indirect cascade of boosts to send these formal or informal deletion requests? an allowlist-federated instance obviously makes that far more tractable, and otherwise I could potentially see annoying paths to doing it anyway if i had been the admin and had every log ever sitting somewhere to trawl through, but in the case of a normal user whose instance is already gone and who doesn't have an ongoing relationship with the prior admin, this is hardly a realistic way to address that concern.

(aha i have found the answer to my own question: miniaturization for fractions in phototypesetting)

i wouldn't necessarily trust a repo that does seem relevant either. it's trivial to put any data you want at a url which, at a glance, appears to legitimately belong to any repo you can fork.

...crediting him as the author of the original, not the mac port.

without commenting on anything to do with trademarks, in what way is that even slightly pretending to be him? why would they put another, separate bio alongside as the person doing a mac port if they were intending to masquerade as the original author?