svenman in theory you could but in practice you cant, I tried to research this a while back but couldent find a definite answer but various forums suggested that 32 bit programs have an active thread limit of something around 2080 and once that is reached the program will crash for some reason. Some forums said different though but that number correlates to SER crashing at around that thread count.
Now every active project you have is classed as an active thread by SER so to have 2000 projects active at once means you are already taking up 2000 threads meaning SER is highly likley to crash at any time. I run at 1800 threads with no problems, I tried at 1900 but it does crash randomly there too.
You can test this pretty easily by making a burner project targeting google.com then duplicate it 2000 times, select all, right click, set project active and see what happens. If you do this test let us know what happens as I am curious .
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The big thing is just going to be keeping your thread-count reasonable. I would not go over 900 threads, and you should be fine.