I started making this in.. 2007? Back then productivity apps on the web was in its infancy, and it certainly didn't appear as an option to me.

And yes, I'm also guilty of using the tools I'm familiar with, as a predominantly C++ developer, I enjoy efficient things.

Honesty and pragmatism, can't go wrong with that. Thank you for such a lovely answer.

Hope the question came across constructively to you at least, it was meant to be. I think to some it read it as "why not cool trends". Should have clarified it was just curiosity about an engineering decision.

Sure it's a valid question, and today there are many good reasons why something is better off as a web-app.

I have some REALLY large TreeSheets documents (equivalent of 200 pages worth of text, but all in a ton of tree nodes), and it be fun to see if a web based version could handle it. I'm hoping someone will try :)

Certainly I would never want to write a cross-platform GUI app in C++ again.. wxWidgets has been a pain.

Because there are still plenty of people (myself included) who prefer native apps. Thankfully :)

Downvote for wanting to know why? I assumed there are specific benefits rather than the the principle of it.

In case in matters the reason I ask is usage scenarios. Even if I take notes at my laptop 95% of the time, using a phone once in a while when an idea comes is helpful.

That has zero import on the underlying platform, really. There are plenty of native multi-user apps. Some of the earliest collaborative tools (like Collabra Share and NetMeeting) were native apps.

And you might be familiar with multiplayer games like Quake :)

Yes, but then it will need a server side component and an actual server (unless you set it up as some kind of peer to peer thing).