Thank you, that is good to know.
I desperately need 64bits to be able to manage more memory in my current project. That is actually the only feature i'm looking for and that would make it worth spending weeks of work fixing all the problems that would surely arise when updating my project to GMS2 !
Especially when i read about how everything has changed regarding tiles and depth... and as my game is isometric and uses both these features extensively, i can forsee its gonna be a nightmare to update...
I guess i will wait and see!