Vitalik has been clarifying what was happening with his account last week. His account got hacked due to the sim swap. I think that it has nothing to do with twitter's security but i do agree if twitter's security was weak.
There have been many similar cases happened since a few years ago. Glad vitalik has gotten back his account again.
First i wondered why someone like vitalik would not use it, but reading about it, it now seems that if your phone number is linked to account, 2FA isn't going help you. People can just social engineer their way to your account via gullible phone network staff.
While looking at this closely, i also noticed that google 2fa is not an option anymore for non-subscibers, which is just mad. There are many influencers that are not paying subsctiption, because of principle
And platform formerly known as twitter thought, that it might be ok for their followers to get scammed, if they don't pay for subscription.
Now it turns out it doesn't even matter if you pay subscription, if hacker uses social engineering to telecommunications company.
Twitter is working like a toilet in a public train.