Developer tools have never had a huge market. Honestly, what are the necessary products for a relatively small market of thrifty developers? Maybe an editor, a nice keyboard, hosted code repo, and some code analysis tools? It's not a huge market.

Containers are something else entirely. They'll probably be running on every device on the planet in one form or another in just a few years. Anytime you're on the forefront of something like that, there's money to be made.