Twitter is going to be here for a long long time. It's not going to suddenly shut down, it's not going to slowly decline, there is not going to be mass abandonment.
Elon might be cocky, but at the end of the day he is a successful businessman. He didn't just sent out that loyalty pledge email out of cockyness. He really wanted to kick out everyone who doesn't believe in him and his beliefs. And he sent that email well after understanding how Twitter runs and putting his loyal people from Tesla ans SpaceX in charge of operations.
The woke crowd needs to get out of denial and start coping with the fact that Twitter is not the bastion of unopposed woke ideology anymore.