Today, I spent the whole day using cursor composer 2.5 to migrate from platejs to lexical.

Who would have thought? A text editor library that officially doesn't support smooth use of huge documents, writes a bunch of fancy features, but once your document gets a bit long, it simply breaks.
After checking around, the platejs officials said they haven't solved it, and there's no sign they intend to.
Finally, research and investigation,
First, manually insert thousands of blocks into each library's official website, then type yourself.
The ones that pass the test are good libraries.
In the end, I chose to trust lexical.
Today's experience was great; just wait and see if there are any huge pitfalls ahead.