Godot 3.0 Betta and porting project (have to?)

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:bust_in_silhouette: Asked By DimitriyPS
:warning: Old Version Published before Godot 3 was released.

In connection with the release of the beta version of the long-awaited Godot 3.0 I want to ask:

  1. Yes, I understand that this is not a release but a beta version signifies that backwards compatibility will not be broken in the release? (as it was a statement in the alpha versions)?

  2. For porting projects should use the tool in Godot 2.1 or is there a more recent tool?