Apple has added simplified options to macOS/OS X whose mere presence leads some people to panic that these simplified options become mandatory (eg, Mac App Store, Launchpad) even though that hasn't really happened in the 15+ years of OS X. Occasionally Apple does a big overhaul of some apps to rethink their UI that take away some options (eg, iPhoto/Photos, iMovie, Final Cut Pro X, iWork, Disk Utility, AirPort Utility) but most of those missing options get re-added over time, though some features might be gone forever (RAID creation in Disk Utility, a host of options in AirPort Utility). However, it is extremely rare that any command line UNIX tools are removed (RAID creation is still possible via the command line).