>Google Docs hasn't had a real upgrade since 2005 because they are stuck in callback hell

And we have to believe you on that because... ?

This is anecdotal, but I manage my golf league scoring with a relatively complex multi-sheet spreadsheet. In 2005 I couldn't even open it in docs. In 2010 I could open it, but many formulas didn't work. In 2013 most things worked, but it was unusably slow. Today it works flawlessly in Google Sheets and I don't even bother opening Excel anymore for it.

I'd say they've definitely made some upgrades.

I take it you don't use Google Docs. It has improved considerably over the last few years: - better office import - better commenting / colab - several UI refreshs

It hasn't changed a lot in the last year or two, but with "since 2005" it's hard to take your comment seriously.

Well it wouldn't be difficult to avoid that fate these days, would it?

I assume they will be using TypeScript, async/await and so on. It's a pretty great language to write in, certainly comparable with C# in terms of maintainability IMO. And a later tweet clarifies that it's being used with React Native to create an actual native app rather than force a webview everywhere.

Everyone has a gut reaction to news like this, but it sounds good to me, and the reasons for doing it seem pretty clear.

Huh, I thought they wrote in Java and compiled it to JavaScript? Searching, I'm thinking of GWT - https://en.m.wikipedia.org/wiki/Google_Web_Toolkit - and it seems like a good candidate for Google Docs.

Probably in the works in the background. Google tends to rewrite everything from scratch and ask people to migrate optionally until it's stable.