Powerful Bidirectional Path Tracing for more realistic render results (Optional feature, better caustics, and lesser noise)

Hello guys. I am not that familiar with this matter but I am aware of the challenges this presents. I would like to propose a feature that would allow the user to enable bidirectional path tracing. This would be great if the user want's to prioritize a much realistic rendering compared to when it is disabled, prioritizing the stylized features of blender.

I hope this optional feature would be considered. This would definitely improve blender's render quality. Especially to those users who are more in the side of realism. If this is highly possible with a small amount of nodes, noise, and render time, It would be nice but I am not sure if this would be possible.

Some say this would make blender have to do a close to oveehaul on the render engine if they have to do this but I am not entirely sure if this is true. I hope that this is not the case this time around.

Thank you.