0Grapher: Listen, you said you do not use mods. In other words: You don't know what you're talking about. So, please don't mislead people with your uneducated opinion. There's no guarantee that you currently get better performance on specific hardware you might have and possibly the FPS optimizer is a better choice.
I tried some mods... I just don't like to play with mods.
Just try and you will understand... there is almost no loading time in OpenMW, while if you use Morrowind there are lots of loading time (even when you change zone).
And just try the difference between swim in Morrowind and in OpenMW.