How recently? If you installed IntelliJ during 2020 it didn't have native ARM support yet[1], and had to be reinstalled to get it, so it would have been running in emulation.
[1] https://blog.jetbrains.com/idea/2020/12/intellij-idea-2020-3...
[1] https://blog.jetbrains.com/idea/2020/12/intellij-idea-2020-3...
Also, many NeoVim plugins are using component from VSCode, and the other way around.