Why is Undo so terrible?

[Skylonxe]

@BrUnO_XaVIeR

The Undo system works.
Thing is, different tools in Unreal are “owned” by different programmers. The programmer is responsible for implementing “Transaction” code where they must be implemented in C++, that is the backbone of Undo system, but very often there’s places where transactional actions should be implemented and the programmer didn’t do it.

And the Blueprint graph’s Undo is super slow because every time you undo the entire graph of nodes and connections are reconstructed.

But the fact is that the system is a bit dated. Having one giant undo sitting on top of whole engine means that Undo in blueprint can undo something in completely different part of the game. Undo should be per window.