In reply to Sarah Gooding.

I recently asked few people (big website owners with 100k> organic pageviews/month) who still like using Classic Editor over Block Editor and most of the responses were –
1. If something can be done using the existing Classic Editor, why would they bother to learn Block Editor.
2. Had a bad experience in the start and gave up eventually. Seems like Block Editor was buggy in the start.

Here are all the responses – https://imgur.com/a/vWSMX9u

There are many preparations that need to be done when asking people to shift to new technology. Education and Bug-Free Product seems to be the most important of it. If the people are not shifting, probably its not because they’re stubborn, but because they’ve found their way of using WordPress.