I think it will work if they make the long tweet into a native card, like a screenshot, instead of "read more." Having too many truncated tweets + "read more"

I think it will work if they make the long tweet into a native card, like a screenshot, instead of "read more." Having too many truncated tweets + "read more" would kill the experience. Twitter works because it's skimmable. Removing the character limit is similar to the spam problem. It shifts the mental burden from the sender to the receiver. Instead of the sender being forced to compress, the receiver has to spend more time processing the text.