In my project, the content editors are often writing their content in a tool of their choice, such as Notion or Google Docs.
Currently, rich text formatting from tools like Google Docs is stripped, and the content is pasted as plain text.
Between Google Docs & Notion, copy-pasting automagically preserves basic formatting in both ways. I'm not sure how it works, but it would be nice to have this convenience in Strapi too.
Notion generally pastes into plain text fields as Markdown, also in the Blocks Editor, but that Markdown isn't auto-converted to its blocks editor equivalents.