I briefly tried it : I don't see the point, there is no way to connect it to your online collabora instance or directly to Nextcloud or anything except your local files.
Just use LibreOffice at this point, at least it has native performances and is not an app bundled inside a browser.
> Just use LibreOffice at this point, at least it has native performances
I don't think you've ever used LibreOffice if you think it in any way fits the description "performant". It's a great project but I wouldn't exactly call it snappy.