I am making a game. I use Vim (infinitely faster and more product than other text editors) and write a single command in my terminal to compile. Vim makes a lot of sense when you want to work fast and don't want bloated development toolchains to slow you down. There's nothing in modern IDEs that would increase my productivity that I can't add to Vim in about 5-20 minutes.
I think I'll have an alpha/beta testing period with interested volunteers. Then hopefully sell it. Then after some years and waning interest, probably open source it.