You can always add artificial delay if that's what you want, but if you don't want to delay to interact with your audience/have them interact with the game, you want something that can do low-latency.

Totally. Avoiding screen sniping should be up to the streamer — in OBS, for instance, one could set up a scene with one source item, an instance of another scene, then add a delay filter to it.

Then one can freely switch between the live scene and the delayed scene. Simple.

Moreover, your audience are all at the same part of the stream, not separated by seconds because of buffering.

It's definitely not a feature since twitch has been trying hard the past years getting that number down a lot.

They have extra options for artificial delay if you need it.