They have already been 3 years in EA for first Act and yet performance won't be optimized yet? Sure i bite it.
I confess that’s a guess on my part. I am assuming that while there is some performance tuning in the course of development when degradation is observed, given that things are changing all the time the real effort in making the game run as smoothly as possible happens towards the end when the game functionality has largely stabilised. Why would you spend time and effort optimising something that might change significantly before release?
I’ll admit that might just be an old-fashioned perspective on the development cycle, though, and for all I know Larian may have an approach and the tools to support it that iteratively performance optimises for each release!