I'm probably mis-remembering.
Anyone could browse Twitter anonymously, since the beginning.
That disappeared and Musk got lots of praise for it, probably entirely unwarrented but it was basically the only thing that improved post-Musk. Then it came back with a vengeance.
Here's proof right here on HN: https://news.ycombinator.com/item?id=33769715
Funny that people also found ways to criticize Musk back then for doing that :D.
Do you understand now why we make corrections to patently wrong statements like yours?