The number one rule of writing twitter threads should be to never do it in the first place. Reading fragmented thoughts (and composing in terms of fragmentable thoughts) is ridiculous and then you have people replying to different parts of it, all in different chains that you have to follow down manually.

If you want to write longform, just write longform. If you want annotations, use software that actually has good annotating features and history tracking, such as google docs or maybe a paid alternative. Not twitter.