TBF, Jetbrains IDEs do feel sluggish at least on macOS compared to the alternatives (like Xcode or VSCode) on my mid-2014 13" MBP. I don't know if the JVM has performance problems specific to macOS which would explain why big UI applications feel so laggy, or whether other systems with more recent CPUs simply have more reserves to hide the lower UI performance though (the latter is probably more likely).