Xcode is about as native as you can get (developed by the same company as the OS!), yet it becomes more sluggish with each new version. I think the real problem

Xcode is about as native as you can get (developed by the same company as the OS!), yet it becomes more sluggish with each new version. I think the real problem is product managers focusing too heavily on "shiny new features" and less on efficiency/stability, which is mystifying since these are all dev tools, after all.