Great job on this! It has a good amount of polish that you should be proud =)
Interesting that Workflowy has been laggy for your buddy. I've been using it since 2011 and only tend to have lag problems only when using it in IE (or Edge now) when at work, as well as Firefox for some reason. Safari and Chrome have virtually no problems with the size of my document.
The lag was for initial page load, and is just a historical footnote, probably. Here's what I dug up from past chats: In May 2015, for a 250k bullet document, it used to take more than 5 minutes. Apparently by July, it was down to 30s-60s. I'm sure it's much better now!
Interesting that Workflowy has been laggy for your buddy. I've been using it since 2011 and only tend to have lag problems only when using it in IE (or Edge now) when at work, as well as Firefox for some reason. Safari and Chrome have virtually no problems with the size of my document.