There's a dead comment below yours that says "IDERA fired the entire Ext JS dev team yesterday" -- is that true or false? Why was it downvoted to oblivion?
Edit: apparently it's true: https://news.ycombinator.com/item?id=15366051
Edit: apparently it's true: https://news.ycombinator.com/item?id=15366051
https://news.ycombinator.com/item?id=15365797
Edit: It certainly looks as though the entire team was let go based on the LinkedIn post you linked to in your edit.
We'll see how that turns out.
I've to admit that, on some rather rare occasions, I'm thinking about Jack Slocum and how he gave away/was taken away that thing that once was a truely remarkable, changeing lib for js, at least if you take into account when extjs was released. And I wonder what would have happen to him if he invented something like extjs in our venture capital and crowdfounding times.
I do not know. I don't work in that part and couldn't comment if I did. I'm only commenting to point out that Idera does indeed focus on dev tools, where the article thought it didn't. FWIW, Delphi and C++Builder are still going strong under Idera.