Looks like Cubase doesnt totally free up the memory when you close your projects
and load another one. That means , if you load many projects one after the other, you'll get a very slow Cubase and very little memory left , and consequently many disk swapping.
For instance, when I open a project that takes about 7 gb of memory, if I close it , Cubase still takes 2-3 gb of memory , unlike the 250 mb Cubase takes when first opened.
So, while this situation is sustainable if you work on 2-3 projects, if you need to open at least 10-15 projects in a short amount of time, you need to close Cubase a few times , then do the purge command in OSX terminal.
Kinda annoying isnt it ?
Maybe something to consider, a true purge of the memory when closing a Cubase project....