To be fair, the importance of those tweets in shaping the public conversation might also die because of that. In the high old days era of the 2010s I could go and read what interesting people were thinking about today on Twitter. Now if I pick a random account I know is active I see what they were saying in 2022 for some reason.

They're relying very heavily on their existing network of users if that is not some weird thing that only affects me. I'd assume most readers don't create accounts.