First, let me be clear that I absolutely dont condone requirements to create an account, but the complaint coming from Musk is rich considering he now requires an account to use Twitter and his draconian api costs.
It's bullshit of the highest order.
https://www.tesla.com/support/how-create-or-delete-tesla-acc...
No it isn't. If you don't have an account you can view an individual tweet, but you can't see threads and you can't see replies.
I'm still annoyed about https://twitter.com/simonw/status/1077737871602110466 - I spent over a year building a thread of behind-the-scenes Spider-Verse content and it's now effectively invisible to anyone who isn't signed in to Twitter.
You can't even see someone's most recent tweets without signing in! Visit https://twitter.com/simonw while signed out and you'll see a random selection of my popular tweets from the past few years - but you won't see my most recent content any more.