They also have kept the unity logo splash screen being optional which is nice.

I would say it’s entirely irrelevant to being nice. Unity demanding that every garbage tier game flaunt that it was made with Unity seemed like it was a net negative for unity itself.

Is the same true of Unreal?

You do not need to show a splash screen for unreal. In fact, I believe you need to get permission to do so, even if they’re only go to refuse for porn and shit.

You do need to reference them in the credits.

No, it's the exact opposite. You have to get permission to use the Unreal logo.

That is a minor thing that really annoys me. Modern games all look like NASCAR when they start.

For some PC games, you can delete the video files for those intros in order to start the game faster.

Simple idea, although I assume Steam periodically runs integrity checks which would restore the missing file? Minor savings for my GOG library.

You're right. Every time the game updates, I have to re-delete the files.