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Out of interest, what about Delay nodes? AFAIK they set up their own Timer w/Delegate under hood in C++. Does that therefore take advantage of new API?
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Delay nodes don’t use timers. As a latent action they get an UpdateOperation call each frame and decrement frame time from TimeRemaining until it is <= 0 and then fire output pin.
However, all engine systems and sample games have been converted to use new API and if you were using old one in your own game code you would be getting deprecated API warnings when compiling.