C Camera • Character Controlling
CD Collision Detection
E Events • Exceptions
G Gameflow
LM Level Management • Misc
R Raycasts
S Strings
T Threads
UI UI • Interface
In addition, follow Visual Scripting - a feature of Unity'19
The recently released 2019 LTS offers a stable version for the ones who want to lock in their production on a specific version of Unity for maximum stability, or basically the ones who prefer infrequency in patches via the long term support versions. Its primary features focus on a wide array of topics, but since we are concerned with scripting in particular here, the pros you should be aware of include addressables, the burst compiler and incremental garbage collection. For upgrading from any 2018 Unity version to the 2019 LTS, follow this guide.