[Bug] Global illumination not really working?

Noticed recently that even with global illumination enabled in the settings, it doesn't seem to really do much. I notice it in the tree, they are given a bit more light and colour. However, in buildings, if you have a central light in the middle of a room full of tables, there will be incredibly harsh shadows and almost no lighting at all in those shadows from potential bounces.
A very obvious example I noticed was in a small rooom where we have an oxite lamp on top of a wardrobe and the light coming from that went into a perpendicular wall which should add some bounce light to the side of the wardrobe, however there is zero blue illumination and a very sharp shadow.

I know you guys are hard at work on making performance better for people, but it'd make a seriously massive difference, especially to interiors if there was better GI/bounce lighting.

Even if it was just an extra option for those with performance to spare, that'd be amazing.