Do you have used Unity really, tried to make a game ?
I followed their Tihrd personn tutorial.
The Workflow, is 10 years in advance compared to A8 !!!!!
(I don't mention physics properties, camera panel, apply shaders directly on object properties etc ...., i stop , the list is so long !! )

I have a good internet connection, the soldier demo just runned great, and you need a good PC also.
I hope they'll deliver an installable demo directly on PC instead of Web Browser !

Sorry, but i tried Shade C package with A8, lot of folders,
even following the doc , i didn't succed to make work depth
of field !
Each time the users solutions are complicated , or not completely clear to run, they give a full demo instead
of a simple mesh, with only the code ... well why do you think we don't see any game using these solutions ?
No need, complicated, users that don't have seen it etc ...
Unity 3 performances are boosted , it have even lot more great things to come.

I like A8 (not it's workflow, or tools), but for small game making. If i planned next gen features, or mdeium game (penumbra style game, or some Follout 3 style with terrain)
with detailled 3D art at screen and performance need
indeed i would turn to Unity.

Don't begin to say 3DGS can do it , like in the hold days
people saying 3DGS could do same scenes as Unreal 3 engine !!
some of them even tried to make a 3D scene from a screenshot to prove 3DGS can do it , it maked my day