I don't understand the fuzz about it. There are a lot of commercial/closed-source devtools out there (IntelliJ, Rider) for otherwise open languages/platforms that devs are obviously happy to use and pay for. We are not demanding that every Java/Python/PHP etc. tool is open source and free, why is there this double-standard for Microsoft?
The base edition of IntelliJ (and also the base edition of PyCharm) is open source: https://github.com/JetBrains/intellij-community