nah, that’s not true at all. have a look at ‘rich-text’[1] which allows for transforms on metadata in a separate stream from the main content. it’s the same basic algo used for OT on plain text.
(i was the cto at a startup which used this to create a multi-user text editor with rich text support in 2015ish)
(i was the cto at a startup which used this to create a multi-user text editor with rich text support in 2015ish)
1: https://github.com/ottypes/rich-text