Here's me complaining[1] about the login walls way back in 2021, this was before the Elon takeover.
https://news.ycombinator.com/item?id=28268365
Edit: Some more posts -
Both are correct, at least according to my memory: you used to be able to read tweets without an account, but that stopped, and it stopped before Musk took over.
There were similar trends at other social media sites that happened around the same time.
Interesting; if you'd have asked me when Elon took over I'd have said something around 2020-2022. Probably why everyone assumes it's a result of him
That's a completely unrelated issue. Once someone sent you a link to a tweet, you could read it.