I wonder how much selection/sampling bias there is. It’s probably a lot easier for JetBrains to publicize this to people who are more likely to use JetBrains software. People who use CLion/PyCharm, may be much less likely to use Visual Studio.

The Embedded section has no usage listed at all for Keil uVision or STMcube. That’s quite strange to me — not that they would be some small fraction, but that they would be entirely absent.