Hey - thanks for using Collabora Online (COOL) - we're doing a chunk of work to accelerate interactive editing, and lots of that starts to land in 22.05 - time-based document change compression (deltas), improved JS, reduced latency of event handling (particularly in the browser where handling websockets related to rendering & the DOM is a bit too 'exciting') - with lots of wins recently. Hopefully you can enjoy them in our next release coming soon.

Wow - some great experience; it would be great to have your help improving the Document Liberation wpd filters - we do a great job there, but no doubt improvements are always possible - particularly with better understanding =)