Since the amount of variations of "real" sex scenes in SMA are, in comparison to your standard sex scenes with choices mainstream scene players, almost endless... in regard to the pose editor... etc.pp. - I think SMA just shows what is possible if the dev focus in game play and functionality and does know when to bring in heavy textures and environment that actually doesn't count. and so on...
I remember one dev of another game who said: "because of the quality of the game" when asked why his project is about 3 GB in size... at that time you were able to walk in a room - and nothing more.
So all in all together - SMA is much more a game with real sex scenes than many other sex scene viewer type of game (concept studies) around here.
My opinion... which I was happy to share with you.