My model of Tim Cook's vision for Apple was "To sell more, we must be more simple. Configuration is complexity and complexity eats battery life which we must defend against user decisions and bad software. Permit software products to be as minimally configurable as necessary to support the features and battery life we advertise. Defects of insufficient configurability are therefore features. Mail and web cannot be defeated as open standards, all others can be. Close them and own them at 30% revenue cut."

I will give Tim Cook credit for a category software improvement: reliability. While poor performance, memory bloat, and UI slop have been hallmarks of macOS native apps, they have stopped crashing. Xcode is usable. I miss OS X, but I do not miss the instability.