Flexibility and customization possibilities.  Really neat to be able to co-edit in real time with people on the same doc.   I think nostr will bring back greatness again to collaborative text editing apps like hackpad was.  

Here are some old videos before it got swallowed up by dropbox.... well no matter, one of the cofounders ended up creating Github copilot, haha. 

https://www.youtube.com/watch?v=fMl-qUA-n0o
https://www.youtube.com/watch?v=Mn4mWvt5W4k