FollowFixedUpdate can be used to create as example a quick and easy First Person Camera
CinemachineDollyTrackMover Script lets you move a Cinemachine Virtual Camera to Move on a Dolly Track Path.
You might missed to edit out some Debug Logs or forgot about them when exporting your Game. To make sure they wont impact your Game in Runtime you can Disable the unityLogger on Startup
No we don’t mean that you cannot Use them. But you should try to avoid them and break down your C# Code. There are only a few Reasons why you need to Use a Else Statement. Switch should be avoided since it is a very complex Structure inside CSharp and is basicially nothing else then a if else Statement. While the Foreach Wraps around a while loop and produces extra garbage inside your Project.